Ethylene oligomerization processes

ABSTRACT

Process for producing alpha olefins comprising contacting ethylene, a zirconium based catalyst system comprising, a hydrocarbylmetal compound, a chain transfer agent, and optionally an organic reaction medium. Chain transfer agents which can be utilized include a) hydrogen, b) a compound comprising a hydrogen silicon bond, a compound having a hydrogen sulfur bond, a compound having a hydrogen phosphorus bond, or c) a transition metal compound chain transfer agent.

FIELD OF THE INVENTION

The present disclosure relates to processes for producing normal alphaolefins. More particularly, the present disclosure relates to improvedprocesses for oligomerizing ethylene to normal alpha olefins.

BACKGROUND OF THE INVENTION

Alpha olefins are important items of commerce. Their many applicationsinclude employment as intermediates in the manufacture of detergents, asprecursors to more environmentally friendly refined oils, as monomers,and as precursors for many other types of products. One method of makingalpha olefins is via oligomerization of ethylene in a catalytic reactioninvolving various types of catalysts and/or catalyst systems. Someethylene oligomerization catalyst systems produce significant quantitiesof polymer which can reduce reaction system operation time beforerequiring reactor cleaning, reduce reaction system reliability, and/orcomplicate product isolation. Applications and demand for normal alphaolefins continue to increase and competition to supply themcorrespondingly intensifies. Thus, novel and improved processes forethylene oligomerization are desirable.

SUMMARY OF THE INVENTION

The present application relates to processes comprising: a) contactingi) ethylene, ii) a catalyst system comprising 1) a zirconium compoundhaving the formula ZrX¹ _(m)Y¹ _(q), where each X¹ independently is ahalide, each Y¹ independently is a hydrocarboxide, adihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate,or a β-diketonate, m is a range from 0 to 4, q is in a range from 0 to4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetalcompound, iii) a chain transfer agent, and iv) optionally, an organicreaction medium; and b) forming an oligomer product in a reaction zone;and wherein the oligomer product has a Schulz-Flory K value from 0.4 to0.8. In an aspect, the chain transfer agent can be i) a compoundcomprising a hydrogen silicon bond, a compound having a hydrogen sulfurbond, a compound having a hydrogen phosphorus bond, or any combinationthereof, ii) hydrogen, or 3) a transition metal compound. In someaspects, the processes can produce an oligomer product comprising (a)less than 1 wt. % of polymer, (b) less than 1 wt.% compounds having aweight average molecular weight of greater than 1000 g/mol, or (c) anycombination thereof wherein the wt. % is based on the total weight ofthe oligomer product. In another aspect, the processes can produce anoligomer product comprising (a) polymer having a lower Mw, (b) a polymerhaving a lower Mw maximum peak, (c) a reduced percentage of polymer, (d)a polymer having a reduced percentage of polymer having a Mw greaterthan 100,000, or (e) any combination thereof relative to the sameprocess not using the chain transfer agent comprising a compound havinga hydrogen silicon bond, a compound having a hydrogen sulfur bond, acompound having a hydrogen phosphorus bond, or any combination thereof.

BRIEF DESCRIPTION OF THE DRAWING

The patent application subject matter can be understood by reference tothe following description taken in conjunction with the accompanyingdrawings, in which like reference numerals identify like elements, andin which:

FIG. 1 illustrates an example of an ethylene oliaomerization apparatus.

While the patent application subject matter is susceptible to variousmodifications and. alternative forms, the drawing illustrates specificembodiments herein described in detail by way of example. It should beunderstood, however, that the description herein of specific embodimentsis not intended to limit the claimed subject matter to the particularforms disclosed, but on the contrary, the intention is to cover allmodifications, equivalents, and alternatives falling within the spiritand scope of the invention as defined by the appended claims.

DEFINITIONS

To define more clearly the terms used herein, the following definitionsare provided. Unless otherwise indicated, the following definitions areapplicable to this disclosure. If a term is used in this disclosure butis not specifically defined herein, the definition from the IUPACCompendium of Chemical Terminology, 2nd Ed (1997) can be applied, aslong as that definition does not conflict with any other disclosure ordefinition applied herein, or render indefinite or non-enabled any claimto which that definition is applied. To the extent that any definitionor usage provided by any document incorporated herein by referenceconflicts with the definition or usage provided herein, the definitionor usage provided herein controls.

Herein, features of the subject matter can be described such that,within particular aspects and/or statements, a combination of differentfeatures can be envisioned. For each and every aspect, and/or statement,and/or feature disclosed herein, all combinations that do notdetrimentally affect the systems, compositions, processes, and/ormethods described herein are contemplated with or without explicitdescription of the particular combination. Additionally, unlessexplicitly recited otherwise, any aspect, and/or statement, and/orfeature disclosed herein can be combined to describe inventive processesand systems consistent with the present disclosure.

The terms “a,” “an,” and “the” are intended, unless specificallyindicated otherwise, to include plural alternatives, e.g., at least one,or one or more. For instance, the disclosure of “a trialkylaluminumcompound” is meant to encompass one trialkylaluminum compound, ormixtures or combinations of more than one trialkylaluminum compoundunless otherwise specified.

Groups of elements of the periodic table are indicated using thenumbering scheme found in the version of the periodic table of elementspublished in Chemical and Engineering News, 63(5), 27, 1985. In someinstances, a group of elements can be indicated using a common nameassigned to the group; for example alkali metals for Group 1 elements,alkaline earth metals for Group 2 elements, transition metals for Group3-12 elements, and halogens for Group 17 elements, among others.

For any particular compound disclosed herein, the general structure orname presented is also intended to encompass all structural isomers,conformational isomers, and stereoisomers that can arise from aparticular set of substituents, unless indicated otherwise. Thus, ageneral reference to a compound includes all structural isomers unlessexplicitly indicated otherwise; e.g., a general reference to a C₆hydrocarbon refers to all hydrocarbon having 6 carbon atoms, a generalreference to pentane includes n-pentane, 2-methyl-butane, and2,2-dimethylpropane, and a general reference to a butyl group includesan n-butyl group, a sec-butyl group, an iso-butyl group, and atert-butyl group. Additionally, the reference to a general structure orname encompasses all enantiomers, diastereomers, and other opticalisomers whether in enantiomeric or racemic forms, as well as mixtures ofstereoisomers, as the context permits or requires. For any particularformula or name that is presented, any general formula or name presentedalso encompasses all conformational isomers, regioisomers, andstereoisomers that can arise from a particular set of substituents.

A chemical “group” is described according to how that group is formallyderived from a reference or “parent” compound, for example, by thenumber of hydrogen atoms formally removed from the parent compound togenerate the group, even if that group is not literally synthesized inthis manner. By way of example, an “alkyl group” formally can be derivedby removing one hydrogen atom from an alkane, while an “alkylene group”formally can be derived by removing two hydrogen atoms from an alkane.Moreover, a more general term can be used to encompass a variety ofgroups that formally are derived by removing any number (“one or more”)hydrogen atoms from a parent compound, which in this example can bedescribed as an “alkane group,” and which encompasses an “alkyl group,”an “alkylene group,” and materials have three or more hydrogens atoms,as necessary for the situation, removed from the alkane. Throughout, thedisclosure of a substituent, ligand, or other chemical moiety canconstitute a particular “group” implies that the well-known rules ofchemical structure and bonding are followed when that group is employedas described. When describing a group as being “derived by,” “derivedfrom,” “formed by,” or “formed from,” such terms are used in a formalsense and are not intended to reflect any specific synthetic methods orprocedure, unless specified otherwise or the context requires otherwise.

The term “hydrocarbon” whenever used in this specification and claimsrefers to a compound containing only carbon and hydrogen. Otheridentifiers can be utilized to indicate the presence of particulargroups in the hydrocarbon (e.g. halogenated hydrocarbon indicates thatthe presence of one or more halogen atoms replacing an equivalent numberof hydrogen atoms in the hydrocarbon). The term “hydrocarbyl group” isused herein in accordance with the definition specified by IUPAC: aunivalent group formed by removing a hydrogen atom from a hydrocarbon.Similarly, a “hydrocarbylene group” refers to a group formed by removingtwo hydrogen atoms from a hydrocarbon, either two hydrogen atoms fromone carbon atom or one hydrogen atom from each of two different carbonatoms. Therefore, in accordance with the terminology used herein, a“hydrocarbon group” refers to a generalized group formed by removing oneor more hydrogen atoms (as necessary for the particular group) from ahydrocarbon. A “hydrocarbyl group,” “hydrocarbylene group,” and“hydrocarbon group” can be acyclic or cyclic groups, and/or can belinear or branched. A “hydrocarbyl group,” “hydrocarbylene group,” and“hydrocarbon. group” can include rings, ring systems, aromatic rings,and aromatic ring systems, which contain only carbon and hydrogen.“Hydrocarbyl groups,” “hydrocarbylene groups,” and “hydrocarbon groups”include, by way of example, aryl, arylene, arene, alkyl, alkylene,alkane, cycloalkyl, cycloalkylene, cycloalkane, aralkyl, aralkylene, andaralkane groups, among other groups, as members.

The term “alkane” whenever used in this specification and claims refersto a saturated. hydrocarbon compound. Other identifiers can be utilizedto indicate the presence of particular groups in the alkane (e.g.halogenated alkane indicates that the presence of one or more halogenatoms replacing an equivalent number of hydrogen atoms in the alkane).The term “alkyl group” is used herein in accordance with the definitionspecified by IUPAC: a univalent group formed by removing a hydrogen atomfrom an alkane. Similarly, an “alkylene group” refers to a group formedby removing two hydrogen atoms from an alkane (either two hydrogen atomsfrom one carbon atom or one hydrogen atom from two different carbonatoms). An “alkane group” is a general term that refers to a groupformed by removing one or more hydrogen atoms (as necessary for theparticular group) from an alkane. An “alkyl group,” “alkylene group,”and “alkane group” can be acyclic or cyclic groups, and/or can be linearor branched unless otherwise specified. Primary, secondary, and tertiaryalkyl groups are derived by removal of a hydrogen atom from a primary,secondary, or tertiary carbon atom, respectively, of an alkane. Then-alkyl group can be derived by removal of a hydrogen atom from aterminal carbon atom of a linear alkane.

The term “substituted” when used to describe a compound or group, forexample, when referring to a substituted analog of a particular compoundor group, is intended to describe any non-hydrogen moiety that formallyreplaces a hydrogen in that group, and is intended to be non-limiting. Agroup or groups can also be referred to herein as “unsubstituted” or byequivalent terms such as “non-substituted,” which refers to the originalgroup in which a non-hydrogen moiety does not replace a hydrogen withinthat group. “Substituted” is intended to be non-limiting and includeinorganic substituents or organic substituents.

The term “olefin” whenever used in this specification and claims refersto hydrocarbons that have at least one carbon-carbon double bond that isnot part of an aromatic ring or an aromatic ring system. The term“olefin” includes aliphatic and aromatic, cyclic and acyclic, and/orlinear and branched hydrocarbons having at least one carbon-carbondouble bond that is not part of an aromatic ring or ring system unlessspecifically stated otherwise. Olefins having only one, only two, onlythree, etc . . . carbon-carbon double bonds can be identified by use ofthe term “mono,” “di,” “tri,” etc . . . within the name of the olefin.The olefins can be further identified by the position of thecarbon-carbon double bond(s).

The term “alpha olefin” as used in this specification and claims refersto an olefin that has a carbon-carbon double bond between the first andsecond carbon atoms of the longest contiguous chain of carbon atoms. Theterm “alpha olefin” includes linear and branched alpha olefins unlessexpressly stated otherwise. In the case of branched alpha olefins, abranch can be at the 2-position (a vinylidene) and/or the 3-position orhigher with respect to the olefin double bond. The term “vinylidene”whenever used in this specification and claims refers to an alpha olefinhaving a branch at the 2-position with respect to the olefin doublebond. By itself, the term “alpha olefin” does not indicate the presenceor absence of other carbon-carbon double bonds unless explicitlyindicated. The term “linear alpha olefin” as used herein refers to anon-branched alpha olefin having a carbon-carbon double bond between thefirst and second carbon atom.

The term “normal alpha olefin” whenever used in this specification andclaims refers to a linear aliphatic mono-olefin having a carbon-carbondouble bond between the first and second carbon atoms. It is noted that“normal alpha olefin” is not synonymous with “linear alpha olefin” asthe term “linear alpha olefin” can include linear olefinic compoundshaving a double bond between the first and second carbon atoms andadditional double bonds.

A cycloalkane is a saturated cyclic hydrocarbon, with or without sidechains, for example, cyclobutane. Unsaturated cyclic hydrocarbons havingone or more endocyclic double or one triple bond are called cycloalkenesand cycloalkynes, respectively. Cycloalkenes and cycloalkynes havingonly one, only two, only three, etc . . . endocyclic double or triplebonds, respectively, can be identified by use of the term “mono,” “di,”“tri, ” etc . . . . within the name of the cycloalkene or cycloalkyne.Cycloalkenes and cycloalkynes can further identify the position of theendocyclic double or triple bonds.

A “cycloalkyl group” is a univalent group derived by removing a hydrogenatom from a ring carbon atom of a cycloalkane. Similarly, a“cycloalkylene group” refers to a group derived by removing two hydrogenatoms from a cycloalkane, at least one of which is a ring carbon. Thus,a “cycloalkylene group” includes both a group derived from a cycloalkanein which two hydrogen atoms are formally removed from the same ringcarbon, a group derived from a cycloalkane in which two hydrogen atomsare formally removed from two different ring carbons, and a groupderived from a cycloalkane in which a first hydrogen atom is formallyremoved from a ring carbon and a second hydrogen atom is formallyremoved from a carbon atom that is not a ring carbon. A “cycloalkanegroup” refers to a generalized group formed by removing one or morehydrogen atoms (as necessary for the particular group and at least oneof which is a ring carbon) from a cycloalkane. It should be noted thataccording to the definitions provided herein, general cycloalkane groups(including cycloalkyl groups and cycloalkylene groups) include thosehaving zero, one, or more than one hydrocarbyl substituent groupsattached to a cycloalkane ring carbon atom (e.g., a methylcyclopropylgroup) and is a member of the group of hydrocarbon groups. However, whenreferring to a cycloalkane group having a specified number ofcycloalkane ring carbon atoms (e.g., cyclopentane group or cyclohexanegroup, among others), the base name of the cycloalkane group having adefined number of cycloalkane ring carbon atoms refers to theunsubstituted cycloalkane group (including having no hydrocarbyl groupslocated on cycloalkane group ring carbon atom). Consequently, asubstituted cycloalkane group having a specified number of ring carbonatoms (e.g., substituted cyclopentane or substituted cyclohexane, amongothers) refers to the respective group having one or more substituentgroups (including halogens, hydrocarbyl groups, or hydrocarboxy groups,among other substituent groups) attached to a cycloalkane group ringcarbon atom. When the substituted cycloalkane group having a definednumber of cycloalkane ring carbon atoms is a member of the group ofhydrocarbon groups (or a member of the general group of cycloalkanegroups), each substituent of the substituted cycloalkane group having adefined number of cycloalkane ring carbon atoms is limited tohydrocarbyl substituent group. One can readily discern and selectgeneral groups, specific groups, and/or individual substitutedcycloalkane group(s) having a specific number of ring carbons atomswhich can be utilized as member of the hydrocarbon group (or a member ofthe general group of cycloalkane groups).

An aliphatic compound is an acyclic or cyclic, saturated or unsaturated,carbon compound, excluding aromatic compounds. An “aliphatic group” is ageneralized group formed by removing one or more hydrogen atoms (asnecessary for the particular group) from the carbon atom of an aliphaticcompound. Aliphatic compounds and therefore aliphatic groups can containorganic functional group(s) and/or atom(s) other than carbon andhydrogen.

An aromatic compound is a compound containing a cyclically conjugateddouble bond system that follows the Hückel (4n+2) rule and contains(4n+2) pi-electrons, where n is an integer from 1 to 5. Aromaticcompounds include “arenes” (hydrocarbon aromatic compounds) and“heteroarenes,” also termed “hetarenes” (heteroaromatic compoundsformally derived from arenes by replacement of one or more methine (—C═)carbon atoms of the cyclically conjugated double bond system with atrivalent or divalent heteroatoms, in such a way as to maintain thecontinuous pi-electron system characteristic of an aromatic system and anumber of out-of-plane pi-electrons corresponding to the Hückel rule(4n+2). While arene compounds and heteroarene compounds are mutuallyexclusive members of the group of aromatic compounds, a compound thathas both an arene group and a heteroarene group are generally considereda heteroarene compound. Aromatic compounds, arenes, and heteroarenes canbe monocyclic (e.g., benzene, toluene, furan, pyridine, methylpyridine)or polycyclic unless otherwise specified. Polycyclic aromatic compounds,arenes, and heteroarenes, include, unless otherwise specified, compoundswherein the aromatic rings can be fused (e.g., naphthalene, benzofuran,and indole), compounds where the aromatic groups can be separate andjoined by a bond (e.g., biphenyl or 4-phenylpyridine), or compoundswhere the aromatic groups are joined by a group containing linking atoms(e.g., carbon of the methylene group in diphenylmethane; oxygen ofdiphenyl ether; nitrogen of triphenyl amine; among others linkinggroups). As disclosed herein, the term “substituted” can be used todescribe an aromatic group, arene, or heteroarene wherein a non-hydrogenmoiety formally replaces a hydrogen in the compound and is intended tobe non- limiting.

An “aromatic group” refers to a generalized group formed by removing oneor more hydrogen atoms (as necessary for the particular group and atleast one of which is an aromatic ring carbon atom) from an aromaticcompound. For a univalent “aromatic group,” the removed hydrogen atommust be from an aromatic ring carbon. For an “aromatic group” formed byremoving more than one hydrogen atom from an aromatic compound, at leastone hydrogen atom must be from an aromatic hydrocarbon ring carbon.Additionally, an “aromatic group” can have hydrogen atoms removed fromthe same ring of an aromatic ring or ring system (e.g., phen-1,4-ylene,pyridin-2,3-ylene, naphth-1,2-ylene, and benzofuran-2,3-ylene), hydrogenatoms removed from two different rings of a ring system (e.g.,naphth-1,8-ylene and benzofuran-2,7-ylene), or hydrogen atoms removedfrom two isolated aromatic rings or ring systems (e.g.,bis(phen-4-ylene)methane).

An arene is aromatic hydrocarbon, with or without side chains (e.g.,benzene, toluene, or xylene, among others). An “aryl group” is a groupderived from the formal removal of a hydrogen atom from an aromatic ringcarbon of an arene. It should be noted that the arene can contain asingle aromatic hydrocarbon ring (e.g., benzene, or toluene), containfused aromatic rings (e.g., naphthalene or anthracene), and contain oneor more isolated aromatic rings covalently linked via a bond (e.g.,biphenyl) or non-aromatic hydrocarbon group(s) (e.g., diphenylmethane).Similarly, an “arylene group” refers to a group formed by removing twohydrogen atoms (at least one of which is from an aromatic ring carbon)from an arene. An “arene group” refers to a generalized group formed byremoving one or more hydrogen atoms (as necessary for the particulargroup and at least one of which is an aromatic ring carbon) from anarene. It should be noted that according the definitions providedherein, general arene groups (including an aryl group and an arylenegroup) include those having zero, one, or more than one hydrocarbylsubstituent groups located on an aromatic hydrocarbon ring or ringsystem carbon atom (e.g., a toluene group or a xylene group, amongothers) and is a member of the group of hydrocarbon groups. However, aphenyl group (or phenylene group) and/or a naphthyl group (ornaphthylene group) refer to the specific unsubstituted arene groups(including no hydrocarbyl group located on an aromatic hydrocarbon ringor ring system carbon atom). Consequently, a substituted phenyl group orsubstituted naphthyl group refers to the respective arene group havingone or more substituent groups (including halogens, hydrocarbyl groups,or hydrocarboxy groups, among others) located on an aromatic hydrocarbonring or ring system carbon atom. When the substituted phenyl groupand/or substituted naphtyl group is a member of the group of hydrocarbongroups (or a member of the general group of arene groups), eachsubstituent is limited to a hydrocarbyl substituent group. One havingordinary skill in the art can readily discern and select general phenyland/or naphthyl groups, specific phenyl and/or naphthyl groups, and/orindividual substituted phenyl or substituted naphthyl groups which canbe utilized as a member of the group of hydrocarbon groups (or a memberof the general group of arene groups).

An “aralkyl group” is an aryl-substituted alkyl group having a freevalance at a non-aromatic carbon atom (e.g., a benzyl group, or a2-phenyleth-1-yl group, among others). Similarly, an “aralkylene group”is an aryl-substituted alkylene group having two free valencies at asingle non-aromatic carbon atom or a free valence at two non-aromaticcarbon atoms while an “aralkane group” is a generalized aryl-substitutedalkane group having one or more free valencies at a non-aromatic carbonatom(s). It should be noted that according the definitions providedherein, general aralkane groups include those having zero, one, or morethan one hydrocarbyl substituent groups located on an aralkane aromatichydrocarbon ring or ring system carbon atom and is a member of the groupof hydrocarbon groups. However, specific aralkane groups specifying aparticular aryl group (e.g., the phenyl group in a benzyl group or a2-phenylethyl group, among others) refer to the specific unsubstitutedaralkane groups (including no hydrocarbyl group located on the aralkanearomatic hydrocarbon ring or ring system carbon atom). Consequently, asubstituted aralkane group specifying a particular aryl group refers toa respective aralkane group having one or more substituent groups(including halogens, hydrocarbyl groups, or hydrocarboxy groups, amongothers). When the substituted aralkane group specifying a particulararyl group is a member of the group of hydrocarbon groups (or a memberof the general group of aralkane groups), each substituent is limited toa hydrocarbyl substituent group. One can readily discern and selectsubstituted aralkane groups specifying a particular aryl group which canbe utilized as a member of the group of hydrocarbon groups (or a memberof the general group of aralkane groups).

As utilized herein the term “hydrocarbylmetal compound” refers to acompound having at least one metal-carbon bond where the carbon atomtaking part in the metal-carbon bond is part of a hydrocarbyl group. The“hydrocarbyl compound” can contain other non-hydrocarbyl groups such ashalides, hydocarboxides, alkoxides, carboxylates, and azanides, amongother non-hydrocarbyl groups, as long as the compound contains at leastone metal-carbon bond where the carbon atom taking part in themetal-carbon bond is part of a hydrocarbyl group. Similarly, anyspecific “hydrocarbylinetal compound” (compounds where the metal of thehydrocarbylmetal compound is specified) refers to the compound having atleast one specific metal-carbon bond where the carbon atom taking partin the metal-carbon bond is part of a hydrocarbyl group.

A “halide” has its usual meaning; therefore, examples of halides includefluoride, chloride, bromide, and iodide.

The term “substituted” when used to describe a group, for example, whenreferring to a substituted analog of a particular group, is intended todescribe any non-hydrogen moiety that formally replaces a hydrogen inthat group, and is intended to be non-limiting. A group or groups canalso be referred to herein as “unsubstituted” or by equivalent termssuch as “non-substituted,” which refers to the original group in which anon-hydrogen moiety does not replace a hydrogen within that group.“Substituted” is intended to be non-limiting and include inorganicsubstituents or organic substituents.

The terms “room temperature” or “ambient temperature” are used herein todescribe any temperature from 15° C. to 35° C. wherein no external heator cooling source is directly applied. Accordingly, the terms “roomtemperature” and “ambient temperature” encompass the individualtemperatures and any and all ranges, subranges, and combinations ofsubranges of temperatures from 15° C. to 35° C. wherein no externalheating or cooling source is directly applied. The term “atmosphericpressure” is used herein to describe an earth air pressure wherein noexternal pressure modifying means is utilized. Generally, unlesspracticed at extreme earth altitudes, “atmospheric pressure” is about 1atmosphere (alternatively, about 14.7 psi or about 101 kPa). Referencesto gaseous, liquid, and/or solid materials refer to the physical stateof the material at 25° C. and atmospheric pressure.

Features within this disclosure that are provided as minimum values canbe alternatively stated as “at least” or “greater than or equal to” anyrecited minimum value for the feature disclosed herein. Features withinthis disclosure that are provided as maximum values can be alternativelystated as “less than or equal to” for the feature disclosed herein.

Within this disclosure, the normal rules of organic nomenclatureprevail. For instance, when referencing substituted compounds or groups,references to substitution patterns are taken to indicate that theindicated group(s) is (are) located at the indicated position and thatall other non-indicated positions are hydrogen. For example, referenceto a 4-substituted phenyl group indicates that there is a non-hydrogensubstituent located at the 4-position and hydrogens located at the 2, 3,5, and 6 positions. References to compounds or groups havingsubstitutions at positions in addition to the indicated position can bereferenced using comprising or some other alternative language. Forexample, a reference to a phenyl group comprising a substituent at the4-position refers to a group having a non-hydrogen substituent at the4-position and hydrogen or any non-hydrogen substituent at the 2, 3, 5,and 6 positions.

The term “reaction zone effluent,” and its derivatives (e.g.,oligomerization reaction zone effluent) generally refers to all thematerial which exits the reaction zone. The term “reaction zoneeffluent,” and its derivatives, can also be prefaced with otherdescriptors that limit the portion of the reaction zone effluent beingreferenced. For example, the term “reaction zone effluent” refers to allmaterial exiting the reaction zone (e.g., product and solvent ordiluent, among others), while the term “olefin reaction zone effluent”refers to only the olefins within the reaction zone effluent and theterm “oligomer product reaction zone effluent” refers to oligomerproduct within the reaction zone effluent.

The term oligomer refers to a product that contains from 2 to 20 monomerunits. The terms “oligomer product” and “oligomer product effluent”include all oligomer products made by the “oligomerization” process, butexclude other non-oligomer components of the reaction zone effluentstream, such as unreacted monomer (ethylene), organic reaction medium,and hydrogen, amongst other components. The term “oligomerization,” andits derivatives, refers to processes which produce an oligomer productcomprising at least 20 wt. %, 35 wt. %, 50 wt. %, or 60 wt. % productscomprising from 2 to 20 monomer units. In an example, an“oligomerization” process using ethylene as the monomer produces amixture of products comprising at least 20 wt. %, 35 wt. %, 50 wt. %, or60 wt. % oligomers having from 4 to 40 carbon atoms.

Schulz-Flory K value (sometimes referred to as Schulz-Flory chain growthfactor, K value) can be defined the equation: K=X_(q+1)/X_(q) whereinX_(q+1) is the number of moles of oligomer product produced having q+1monomer (e.g., ethylene) units and X_(q) is the number of moles ofoligomer product produced having q monomer (e.g., ethylene) units.Generally, the Schulz-Flory K value can be determined using any twooligomers of the oligomer product which differs in the number of monomerunits by 1. However, one would appreciate that product isolation andanalysis can lead to inaccuracies in a determined oligomer productdistribution using particular oligomers (e.g., incomplete recovery ofgaseous product and/or solid product during product isolation). Onehaving ordinary skill in the art would recognize such issues and canchoose the appropriate oligomers upon which to base the determination ofthe Schulz-Flory K value.

Catalyst system productivity is defined as grams of a product producedper gram (or mole) of zirconium in the catalyst system utilized in theoligomerization. Catalyst system activity is defined as grams of aproduct produced per gram (or mole) of zirconium per unit of time (e.g.,hour) of an oligomerization. Catalyst system productivity and/oractivity can be stated in terms of various products of anoligomerization and/or components of catalyst system. For example, in anethylene oligomerization process utilizing a catalyst system comprisinga zirconium compound, the catalyst system productivity which can beutilized include (g oligomer product)/(g Zr), among otherproductivities.

Unless otherwise specified, the terms “contact” and “combine,” and theirderivatives, can refer to any addition sequence, order, or concentrationfor contacting or combining two or more components of the disclosedembodiments. Combining or contacting of oligomerization components canoccur in one or more reaction zones under suitable contact conditionssuch as temperature, pressure, contact time, flow rates, etc.

The terms “catalyst system”, “catalyst composition”, “catalyst mixture”,and the like, do not depend upon the actual product or compositionresulting from the contact or reaction of the initial components of thedisclosed or claimed catalyst composition/mixture/system, the nature ofthe active catalytic site, or the fate of the organoaluminum compoundand the heteroatomic ligand transition metal compound complex aftercombining these components. Therefore, the terms “catalyst system”,“catalyst composition”, “catalyst mixture”, and the like, encompass theinitial starting components of the composition, as well as whateverproduct(s) may result from contacting these initial starting components.The terms “catalyst system”, “catalyst con position”, “catalystmixture”, and the like, may be used interchangeably throughout thisdisclosure.

In this disclosure, a process can have multiple steps or can includefeatures having a number of different elements (e.g., components in acatalyst system or components in an olefin oligomerization process,among other features). These steps and/or elements can be designatedutilizing the terms first, second, and third, etc., the series a), b),c), etc., i), ii), iii), etc., (a), (b), (c), etc., and/or (i), (ii),(iii), etc. (among other designation series) as necessary to provide adesignation for each process step and/or element. It should beunderstood that the numerical or alphabetical precedence of thedesignations within a designation series does not imply a particularorder or preference of the process step in a process described herein,the feature(s) described herein, and/or an element(s) in a featureunless specifically specified otherwise or necessitated by other processsteps, elements, and/or element features. Additionally, thesedesignations series are provided to differentiate different processsteps and/or elements in a feature and can be utilized as necessary, andwithout regard to the designation series utilized for a particular step,element, or feature utilized within this description as long as thedesignation series consistently distinguish different features,different process steps, and/or different elements of a feature.

The terms “simultaneously,” “simultaneously contact,” “contactsimultaneously,” and their derivatives when referring to a contactmethod refers to a contact method wherein the two or more recitedcompounds, mixtures, streams, and/or compositions are contacted byflowing into a common junction, pot, vessel, or reactor, among others,at the same time. The terms “substantially simultaneously,”“substantially simultaneously contact,” “contact substantiallysimultaneously,” and their derivatives when referring to a contactmethod refers to a contact method wherein, during the contact of two ormore recited compounds, mixtures, streams, and/or compositions, the twoor more recited compounds, mixtures, streams, and/or compositions arecontacted such that for some period during the contact process the twoor more recited compounds, mixtures, streams, and/or compositions flowinto a common junction, pot, vessel, or reactor at the same time. Itshould be noted that the terms “substantially simultaneously,”“substantially simultaneously contact,” “contact substantiallysimultaneously,” and their derivatives do not mean that the two or morerecited compounds, mixtures, streams, and/or compositions are contactedsimultaneously over the entire addition of each of the two or morerecited compounds, mixtures, streams, and/or compositions. The terms“substantially simultaneously,” “substantially simultaneously contact,”“contact substantially simultaneously,” and it derivatives includescenarios where the flow of one of the (or less than all of the) recitedcompounds, mixtures, streams, and/or compositions can be initiated intothe common junction, pot, vessel, or reactor before the others and/orthe flow of one of the (or less than all of the) recited compounds,mixtures, streams, and/or compositions into the common junction, pot,vessel, or reactor can be completed, stopped, or discontinued before theother recited compounds, mixtures, streams, and/or compositions. In anyaspect and/or embodiment described herein, the terms “simultaneously,”“simultaneously contact,” “contact simultaneously,” and theirderivatives, can be modified by the inclusion of a term providing aquantity of the each of the recited compounds, mixtures, streams, and/orcompositions which can be contacted simultaneously indicate scenarios ofvarious degrees of “substantially simultaneously,” “substantiallysimultaneously contact,” “contact substantially simultaneously,” andtheir derivatives. For example, at least 20%, 30%, 40%, 50%, 60%, 70%,75%, 80%, 85%, 90%, 95% of each of the recited compounds, mixtures,streams, and/or compositions can be “simultaneously contacted” or“contacted simultaneously.” Generally, the percentages of the recitedcompounds, mixtures, streams, and/or compositions that can be“simultaneously contacted” or “contacted simultaneously” can be byweight (wt. %), by volume (volume %), or by mole (mole %). Unlessotherwise specified, recited compounds, mixtures, streams, and/orcompositions that are “substantially simultaneously,” “substantiallysimultaneously contact,” “contact substantially simultaneously,” andtheir derivatives shall mean that at least 50% of each of the recitedcompounds, mixtures, streams, and/or compositions can be “simultaneouslycontacted” or “contacted simultaneously.”

It should be further noted, that in reference to contact method orprocess, “simultaneously,” “simultaneously contact,” “contactsimultaneously,” “substantially simultaneously contact,” “contactsubstantially simultaneously,” and their derivatives is different than aprocess or method wherein one or more a first materials (e.g., compound,mixture, stream, and/or composition) already resides in a pot, vessel,or reactor and one or more other compounds, mixtures, streams, and/orcompositions are added to the pot, vessel, or reactor. In this instancethe first material in the pot, vessel, or reactor does not flow into thepot, vessel, or reactor concurrently with the other compounds, mixtures,streams, and/or compositions and the material in the pot. Thus, thefirst material and the other compounds, mixtures, streams, and/orcompositions cannot be said to be “simultaneously contacted,” “contactedsimultaneously,” “substantially simultaneously contacted,” or “contactedsubstantially simultaneously.” with the other component(s).

The term “contacting” is used herein to describe systems, compositions,processes, and methods in which the components are contacted or combinedtogether in any order, in any manner, and for any length of time, unlessotherwise specified. For example, the components can be combined byblending or mixing, using any suitable technique. Herein, “contacting”two or more components can result in a reaction product mixture or areaction mixture.

Within this specification, the word “reactor” refers to a single pieceof equipment, such as, for example, a vessel, in which a reaction takesplace, but excludes any associated equipment such as piping, pumps, andthe like which is external to the vessel. Examples of reactors includestirred tank reactors (e.g., a continuous stirred tank reactor), plugflow reactors, or any other type of reactor. Within this specification“reactor system” refers to any portion of equipment in which a desiredreaction occurs, including but not limited to, a reactor, associatedpiping, associated pumps, and any other associated equipment. it shouldbe noted that in some cases a “reactor” can also be a “reactor system.”For example, in some instances a polyethylene loop reactor can beconsidered a reactor system. The terms “reactor” and “reactor system”can be qualified to refer to more specific “reactors” and “reactorsystems” by use of additional qualifying terms. For example, the use ofthe term “oligomerization reactor” and “oligomerization reactor system”indicates that the desired reaction within the reactor and/or reactorsystem is an oligomerization.

Within this specification, term “reaction zone” refers to the portion ofa reaction system where all the necessary reaction components andreaction conditions are present such that the reaction can occur at adesired rate. That is to say that the reaction zone begins where thenecessary reaction components and reaction conditions are present tomaintain the reaction within 25 percent of the average reaction rate andthe reaction system ends where the conditions do not maintain a reactionrate within 25 percent of the average reaction rate (based upon a volumeaverage of the reaction rate of the reaction zone). For example, interms of an ethylene oligomerization process, the reaction zone beginsat the point where sufficient ethylene and active catalyst system ispresent under the sufficient reaction conditions (es., temperatureand/or pressure, among others) to maintain oligomer product productionat the desired rate and the reaction zone ends at a point where eitherthe catalyst system is deactivated, sufficient ethylene is not presentto sustain oligomer product production, or other reaction conditions(e.g., temperature and/or pressure, among others) are not sufficient tomaintain the oligomer product production or the desired oligomer productproduction rate. Within this specification the “reaction zone” cancomprise one or more reactors. The term “reaction zone” can be qualifiedto refer to more specific “reaction zones” by use of additionalqualifying terms. For example, the use of the term “oligomerizationreaction zone” indicates that the desired reaction within the “reactionzone” is an oligomerization.

The term “reaction system” refers to all of the equipment to produce aproduct. The term “reaction system” includes reactors, reaction zones,and all the associated equipment, associated process lines, and controlequipment which can bring the necessary component(s) into and out of thereaction system and control the reaction. Within this specification the“reaction system” can comprise one or more reactor zones, one or morereactors, and associated equipment to produce a product. The term“reaction system” can be qualified to refer to more specific “reactionsystems” by use of additional qualifying terms. For example, the use ofthe term “oligomerization reaction system” indicates that the “reactionsystem” relates to an oligomerization.

All publications and patents mentioned herein are incorporated herein byreference for the purpose of describing and disclosing, for example, theconstructs and methodologies that are described in the publications,which might be used in connection with the presently describedinvention.

DETAILED DESCRIPTION OF THE INVENTION

Disclosed herein are processes comprising a) contacting i) ethylene, ii)a catalyst system comprising 1) a zirconium compound, and 2) anhydrocarbylmetal compound, iii) a chain transfer agent comprising asilyl hydride compound, a compound having a hydrogen sulfur bond, acompound having a hydrogen phosphorus bond, or any combination thereof,and iv) optionally, an organic reaction medium and b) forming anoligomer product in a reaction zone. Also disclosed herein, areprocesses comprising a) contacting i) ethylene, ii) a catalyst systemcomprising 1) a zirconium compound, and 2) an hydrocarbylmetal compound,iii) hydrogen, and iv) optionally, an organic reaction medium and b)forming an oligomer product in a reaction zone. Further disclosedherein, are processes comprising a) contacting i) ethylene, ii) acatalyst system comprising 1) a zirconium compound, and 2) anhydrocarbylmetal compound, iii) a transition metal compound chaintransfer agent, and iv) optionally, an organic reaction medium and b)forming an oligomer product in a reaction zone. Also disclosed hereinare processes comprising a) introducing i) ethylene, ii) a catalystsystem or catalyst system components comprising 1) a zirconium compound,and 2) an hydrocarbylmetal compound, iii) a chain transfer agentcomprising a silyl hydride compound, a compound having a hydrogen sulfurbond, a compound having a hydrogen phosphorus bond, or any combinationthereof, and iv) optionally, an organic reaction medium into a reactionzone and b) forming an oligomer product in the reaction zone. Alsodisclosed herein, are processes comprising a) introducing i) ethylene,ii) a catalyst system or catalyst system components comprising 1) azirconium compound, and 2) an hydrocarbylmetal compound, iii) hydrogen,and iv) optionally, an organic reaction medium into a reaction zone andb) forming an oligomer product in the reaction zone. Further disclosedherein, are processes comprising a) introducing i) ethylene, ii) acatalyst system or catalyst system components comprising 1) a zirconiumcompound, and 2) an hydrocarbylmetal compound, iii) a transition metalcompound chain transfer agent, and iv) optionally, an organic reactionmedium into a reaction zone and b) forming an oligomer product in thereaction zone.

In an aspect, the oligomer product can be formed at, the reaction zonecan have, or the reaction zone can operate at, conditions capable offorming an oligomer product. Generally, the catalyst system, theelements of the catalyst system (e.g., the zirconium compound, thehydrocarbylmetal compound, and any other catalyst system elementsdescribed herein), the chain transfer agent, the hydrogen, thetransition metal compound chain transfer agent, the optional organicreaction medium, the oligomer product, the conditions at which theoligomer product is formed, the condition the reaction zone can have,the conditions at which the reaction can operate, and/or any othercatalyst system and/or process elements described herein are independentelements of the processes described herein and are independentlydescribed herein. These independently described elements can be utilizedin any combination, and without limitation, to further describe theprocesses provided herein.

in an aspect, the zirconium compound of the catalyst system can have theformula ZrX¹ _(m)Y¹ _(q), ZrX¹ _(m), ZrY¹ _(q), or any combinationthereof; alternatively, ZrX¹ _(m)Y¹ _(q); alternatively, ZrX¹ _(m); oralternatively, ZrY¹ _(q). X¹, Y¹, m, and q of the zirconium compoundshaving the formula ZrX¹ _(,)Y¹ _(q), ZrX¹ _(m), or ZrY¹ _(q) areindependent elements of the zirconium compound and are independentlydescribed herein. The independent descriptions of X¹, Y¹, m, and q canbe utilized without limitation, and in any combination, to furtherdescribe the zirconium compound. In an embodiment, each X¹ independentlycan be a halide. In an embodiment, each Y independently can be ahydrocarboxide, a dihydrocarbylazanide, a hydrocarbylcarboxylate, ahydrocarbylsulfonate, or a β-diketonate; alternatively, ahydrocarboxide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate, or aβ-diketonate; alternatively, a hydrocarboxide, a hydrocarbylcarboxylate,a or hydrocarbylsulfonate; alternatively, a hydrocarbylcarboxylate or ahydrocarbylsulfonate; alternatively, a hydrocarboxide; alternatively, adihydrocarbylazanide; alternatively, a hydrocarbylcarboxylate;alternatively, a hydrocarbylsulfonate; or alternatively, a β-diketonate.In an embodiment, in can be in a range from 0 to 4; alternatively, in arange from 2 to 4; alternatively, 2; alternatively, 3; or alternatively,4. In an embodiment, q can be in a range from 0 to 4; alternatively, ina range from 2 to 4; alternatively, 2; alternatively, 3; oralternatively, 4. Where in q is an integer in from 2 to 4;alternatively, 2; alternatively, 3; or alternatively 4.

Each halide which can be utilized as X¹ of the zirconium compoundindependently can be fluoride, chloride, bromide, or iodide;alternatively, chloride, bromide, or iodide; alternatively, chloride;alternatively, bromide; or alternatively iodide.

The hydrocarboxide which can be utilized as Y¹ of the zirconium compoundcan be a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ to C₅ hydrocarboxide. Thehydrocarboxide, Y¹, can have the formula ⁻OR². R² of the hydrocarboxidehaving the formula ⁻OR² can be a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ to C₅hydrocarbyl group.

The R² hydrocarbyl group of the hydrocarboxide having the formula ⁻OR²can be an alkyl group, a cycloalkyl group, an aryl group, or an aralkylgroup; alternatively, an alkyl group or an aryl group; alternatively, analkyl group; alternatively, a cycloalkyl group; alternatively, an arylgroup; or alternatively an aralkyl group. The R² alkyl group can be a C₁to C₂₀, a C₁ to C₁₀, or a C₁ to C₅ alkyl group. The R² cycloalkyl groupcan be a C₄ to C₂₀, C₅ to C₁₅, or a C₅ to C₁₀ cycloalkyl group. The R²aryl group can be a C₆ to C₂₀, C₆ to C₁₅ or a C₆ to C₁₀ aryl group. TheR² aralkyl group can be a C₇ to C₂₀, C₇ to C₁₅ or a C₇ to C₁₀ aralkylgroup. In an aspect, the R² group of the hydrocarboxide having theformula ⁻OR² can be a methyl group, an ethyl group, a propyl group, abutyl group, a pentyl group, a cyclopentyl group, a cyclohexyl group, aphenyl group, a toluyl group, a xylyl group, a benzyl group, or aethylphenyl group; alternatively, a methyl group, an ethyl group, apropyl group, a butyl group, or a pentyl group; alternatively, acyclopentyl group or a cyclohexyl group; alternatively, a phenyl group,a toluyl group, or a xylyl group; or alternatively, a benzyl group or anethylphenyl group. In an aspect, each hydrocarboxide, Y¹,of thezirconium compound can be methoxide, ethoxide, a propoxide, a butoxide,a pentoxide, a cyclopentoxide, a cyclohexoxide, a phenoxide, atoluoxide, a xyloxide, a benzoxide, or a ethylphenoxide; alternatively,methoxide, ethoxide, a propoxide, a butoxide, or a pentoxide;alternatively, a cyclopentoxide or a cyclohexoxide; alternatively, aphenoxide, a toluoxide, or a xyloxide; or alternatively, a benzoxide oran ethylphenoxide.

The hydrocarbylcarboxylate which can be utilized as Y¹ of the zirconiumcompound can be a C₁ to C₂₀, a C₁ to C₁₅, a C₁ to C₁₀, or a C₁ to C₅hydrocarbylcarboxylate. The hydrocarbylcarboxylate which can be utilizedas Y¹ of the zirconium compound can have the formula ⁻OC(═O)R³. Thehydrocarbylsulfonate which can be utilized as Y¹ of the zirconiumcompound can be a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ to C₅hydrocarbylsulfonate. The hydrocarbylsulfonate which can be utilized asY¹ of the zirconium compound can have the formula ⁻OS(═O)₂R³. R³ of thehydrocarboxylate having the formula ⁻OC(═O)R³ and/or thehydrocarbylsulfonate having the formula ⁻OS(═O)₂R³ can be a C₁ to C₂₀, aC₁ to C₁₅, a C₁ to C₁₀, or a C₁ to C₅ hydrocarbyl group. The R³hydrocarbyl group of the hydrocarboxylate having the formula ⁻OC(═O)R³and/or the hydrocarbylsulfonate having the formula ⁻OS(═O)₂R³ can be analkyl group, a cycloalkyl group, an aryl group, or an aralkyl group;alternatively, an alkyl group or an aryl group; alternatively, an alkylgroup; alternatively, a cycloalkyl group; alternatively, an aryl group;or alternatively an aralkyl group. The R³ alkyl group can be a C₁ toC₂₀, a C₁ to C₁₀, or a C₁ to C₅ alkyl group. The R³ cycloalkyl group canbe a C₄ to C₂₀, C₅ to C₁₅, or a C₅ to C₁₀ cycloalkyl group. The R³ arylgroup can be a C₆ to C₂₀, C₆ to C₁₅ or a C₆ to C₁₀ aryl group. The R³aralkyl group can be a C₇ to C₂₀, C₇ to C₁₅ or a C₇ to C₁₀ aralkylgroup. The R³ group of the hydrocarboxylate having the formula ⁻OC(═O)R³and/or the hydrocarbylsulfonate having the formula ⁻OS(═O)₂R³ can be amethyl group, an ethyl group, a propyl group, a butyl group, a pentylgroup, a hexyl group, a heptyl group, a cyclopentyl group, a cyclohexylgroup, a phenyl group, a toluyl group, a xylyl group, a benzyl group, ora ethylphenyl group; alternatively, a methyl group, an ethyl group, apropyl group, a butyl group, a pentyl group, a hexyl group, or an heptylgroup; alternatively, a cyclopentyl group or a cyclohexyl group;alternatively, a phenyl group, a toluyl group, or a xylyl group; oralternatively, a benzyl group or an ethylphenyl group. Eachhydrocarboxylate which can be utilized as Y¹ of the zirconium compoundcan be acetate, propanoate, a butanoate, a pentonate, a hexanoate, aheptanoate, octanoate, a cyclopentylacetate, a cyclohexylacetate, abenzoate, a methylbenzoate, a dimethylbenzoate, phenylacetate, orphenylpropanoate; alternatively, acetate, propanoate, a butanoate, apentonate, a hexanoate, a heptanoate, or octanoate; alternatively, acyclopentylacetate or cyclohexylacetate; alternatively, benzoate, amethylbenzoate, or dimethylbenzoate; or alternatively, phenylacetate ora phenylpropanoate. Each hydrocarbylsulfonate which can be utilized asY¹ of the zirconium compound can be methyl sulfonate, ethyl sulfonate, apropyl sulfonate, a butyl sulfonate, a pentyl sulfonate, a hexylsulfonate, a heptyl sulfonate, cyclopentyl sulfonate, cyclohexylsulfonate, a phenyl sulfonate, a toluyl sulfonate, a xylyl sulfonate, abenzyl sulfonate, or a ethylphenyl sulfonate; alternatively, a methylsulfonate, ethyl sulfonate, a propyl sulfonate, a butyl sulfonate, apentyl sulfonate, a hexyl sulfonate, or an heptyl sulfonate;alternatively, a cyclopentyl sulfonate or a cyclohexyl sulfonate;alternatively, a phenyl sulfonate, a toluyl sulfonate, or a xylylsulfonate.

The dihydrocarbylazanide which can be utilized a Y¹ of the zirconiumcompound can be a C₂ to C₃₀, a C₂ to C₂₀, or a C₂ to C₁₅dihydrocarbylazanide. The dihydrocarbylazanide which can be utilized aY¹ of the zirconium compound can have the formula ⁻N(R⁴)₂. In someembodiments, each R⁴ hydrocarbyl group of the dihydrocarbylazanidehaving the formula ⁻N(R⁴)₂ independently can be an alkyl group, acycloalkyl group, an aryl group, or an aralkyl group; alternatively, analkyl group or an aryl group; alternatively, an alkyl group;alternatively, a cycloalkyl group; alternatively, an aryl group; oralternatively an aralkyl group. Each R⁴ alkyl group independently can bea C₁ to C₁₅, a C₁ to C₁₀, or a C₁ to C₅ alkyl group. Each R⁴ cycloalkylgroup independently can be a C₄ to C₁₅, or a C₅ to C₁₅ cycloalkyl group.Each R⁴ aryl group independently can be a C₆ to C₂₀, C₆ to C₁₅ or a C₆to C₁₀ aryl group. Each R⁴ aralkyl group independently can be a C₇ toC₂₀, C₇ to C₁₅ or a C₇ to C₁₀ aralkyl group. Each R⁴ hydrocarbyl groupof the dihydrocarbylazanide having the formula ⁻N(R⁴)₂ independently canbe a methyl group, an ethyl group, a propyl group, a butyl group, apentyl group, a cyclopentyl group, a cyclohexyl group, a phenyl group, atoluyl group, a xylyl group, a benzyl group, or a ethylphenyl group;alternatively, a methyl group, an ethyl group, a propyl group, a butylgroup, or a pentyl group; alternatively, a cyclopentyl group or acyclohexyl group; alternatively, a phenyl group, a toluyl group, or axylyl group; or alternatively, a benzyl group or an ethylphenyl group.In an aspect, the two R⁴ groups of the dihydrocarbylazanide can bejoined to form a hydrocarbylene group, L¹. In such an aspect, the joinedR⁴ groups, i.e., L¹, form a ring or ring system including the azanidenitrogen atom. In some aspects, the L¹ hydrocarbylene group can be a C₂to C₃₀, a C₂ to C₂₀, or a C₂ to C₁₀ hydrocarbylene group; oralternatively, L¹ can be a C₂ to C₃₀, a C₂ to C₂₀, or a C₂ to C₁₀alkylene group. In an aspect, L¹ can be a propylene group, a butylenegroup, a hexylene group, or a heptalene group. In an aspect, eachdihydrocarbylazanide which can be utilized a Y¹ of the zirconiumcompound can be dimethylazanide, diethylazanide, a dipropylazinide,pyrrolidine azanide, piperidine azanide, diphenylazanide, aditoluylazanide, a dixylyazanide, or dibenzylazanide; alternatively,dimethylazanide, diethylazanide, or a dipropylazinide; alternatively,pyrrolidine azanide or piperidine azanide; alternatively,diphenylazanide, a ditoluylazanide, a dixylyazanide; or alternativelydibenzylazanide.

The β-diketonate which can be utilized a Y¹ of the zirconium compoundcan be a be a C₅ to C₂₀, a C₅ to C₁₅, or a C₅ to C₁₀ β-diketonate. In anembodiment aspect, each β-diketonate independently can beacetylacetonate (i.e., 2,4-pentanedionate) or benzoylacetonate;alternatively, acetylacetonate; or alternatively, benzoylacetonate.

in an embodiment, the zirconium compound of the catalyst system can bean at least partially hydrolyzed zirconium compound by contacting thezirconium compound with water (referred to herein as a partiallyhydrolyzed zirconium compound). In some embodiments, the partiallyhydrolyzed zirconium compound comprises, consists essentially of, orconsists of, a zirconium compound (any described herein) contacted withwater. In some embodiments, the zirconium compound of the partiallyhydrolyzed zirconium compound can have the formula ZrX¹ _(m)Y¹ _(q)where each X¹ independently can be a halide (any disclosed herein), Y¹can have the formula ⁻OR² where R² can be any R² hydrocarbyl group(general or specific) described herein or ⁻OC(═O)R³ where R³ can be anyR³ hydrocarbyl group (general or specific) described herein, m can be ina range from 0 to 4, q can be in a range from 0 to 4, and m+q can be 4.In some embodiments, m can be in a range from 0 to 3. In an embodiment,the wherein the molar ratio of water to the zirconium of the zirconiumcompound can be in the range of 0.01:1 to 3:1, 0.1: to 2:1, 025:1 to1.75:1.

In a non-limiting aspect, the zirconium compound of the catalyst systemcan have the formula ZrX¹ _(m)Y¹ _(q) where each X¹ independently can bea halide (any disclosed herein), Y¹ can have the formula ⁻OC(═O)R³ or⁻OS(═O)₂R³ where R³ can be any R³ hydrocarbyl group (general orspecific) described herein, m can be in a range from 0 to 4, q can be ina range from 0 to 4, and m q can be 4. In another non-limiting aspect,the zirconium compound of the catalyst system can have the formula ZrX¹_(m) where each X¹ independently can be a halide (any disclosed herein)and m can be and integer from 2 to 4, alternatively 2; or alternatively,4. in yet another non-limiting aspect, the zirconium compound can havethe formula ZrY¹ _(q) where each Y¹ independently is ⁻OR² wherein R² isa C₁ to C₁₀ alkyl group or ⁻OC(═O)R³ where R³ is a C₁ to C₁₀ alkyl groupand q is an integer from 2 to 4, alternatively, 2; alternatively, 4. Inanother non-limiting aspect, the zirconium compound of the catalystsystem can have the formula ZrX¹ _(m)Y¹ _(q) where each X¹ independentlycan be a halide (any described herein), Y¹ can have the formula ⁻OR²where R² can be any R² hydrocarbyl group described herein, or can havethe formula ⁻OC(═O)R³ where R³ can be any R³ hydrocarbyl group (generalor specific) described herein, in can be in a range from 0 to 4, q canbe in a range from 0 to 4, and m+q can be 4. In a further non-limitingembodiment, the zirconium compound of the catalyst system can be apartially hydrolyzed zirconium compound where the zirconium compound canhave the formula ZrX¹ _(m)Y¹ _(q) where each X¹ independently can be ahalide (any described herein), Y¹ can have the formula ⁻OR² where R² canbe any R² hydrocarbyl group described herein, or can have the formula⁻OC(═O)R³ where R³ can be any R³ hydrocarbyl group (general or specific)described herein, m can be in a range from 0 to 4, q can be in a rangefrom 0 to 4, m+q can be 4, and the molar ratio of water to the zirconiumof the zirconium compound can be in the range of 0.1: to 2:1.

Non-limiting exemplary zirconium compound which can be utilized in thecatalyst systems for the processes described herein can comprise, canconsist essentially of, or can be, ZrCl₄, ZrBr₄, ZrI₄, ZrBr₂Cl₂,ZrBrCl₃, Zr(OC₂H₅)₄, Zr(OC₂H₅)₃Cl, Zr(OC₂H₅)₂Cl₂, Zr(OC₃H₇)₄,Zr(OC₃H₇)₃Cl, Zr(OC₃H₇)₂Cl₂, Zr(OC₄H₉)₄, Zr(OC₄H₉)₃Cl, Zr(OC₄H₉)₂Cl₂,Zr(OC₆H₅)₄, Zr(OC₆H₅)₃Cl, Zr(OC₆H₅)₂Cl₂, Zr(OCOCH₃)₄, Zr(OCOCH₃)₃Cl,Zr(OCOCH₃)₂Cl₂, Zr(OCOC₂H₅)₄, Zr(OCOC₂H₅)₃Cl, Zr(OCOC₂H₅)₂Cl₂,Zr(OCOC₃H₇)₄, Zr(OCOC₃H₇)₃Cl, Zr(OCOC₃H₇)₂Cl₂, Zr(OCOC₄H₉)₄,Zr(OCOC₄H₉)₃Cl, Zr(OCOC₄H₉)₂Cl₂, Zr(OCOC₆H₅)₄, Zr(OCOC₆H₅)₃Cl,Zr(OCOC₆H₅)₂Cl₂, Zr(OSO₃CH₃)₄, Zr(OSO₃C₂H)₄, Zr(OSO₃C₃H₇)₄,Zr(OSO₃C₄H₉)₄, Zr(OSO₃C₆H₅)₄, Zr(H₃CCOCHCOCH₃)4, ZrCl₂(H₃CCOCHCOCH₃)₂,Zr((H₅C₆)COCHCO(C₅F₅))₄, ZrCl₂((H₅C₆)COCHCO(C₅F₅))₂, Zr((CH₃)₂N)₄,Zr((C₂H₅)₂N)₄, Zr((C₃H₇)₂N)₄, or Zr(C₄H₉)₂N)₄. In some aspects, thezirconium compound can comprise, can consist essentially of, or can be,ZrCl₄, ZrBr₄, ZrI₄, ZrBr₂Cl₂, or ZrBrCl₃; alternatively, Zr(OC₂H₅)₄,Zr(OC₂H₅)₃Cl, Zr(OC₂H₅)₂Cl₂, Zr(OC₃H₇)₄, Zr(OC₃H₇)₃Cl, Zr(OC₃H₇)₂Cl₂,Zr(OC₄H₉)₄, Zr(OC₄H₉)₃Cl, Zr(OC₄H₉)₂Cl₂, Zr(OC₆H₅)₄, Zr(OC₆H₅)₃Cl, orZr(OC₆H₅)₂Cl₂; alternatively, Zr(OC₂H₅)₄, Zr(OC₃H₇)₄, Zr(OC₄H₉)₄, orZr(OC₆H₅)₄; alternatively, Zr(OC₂H₅)₃Cl, Zr(OC₂H₅)₂Cl₂, Zr(OC₃H₇)₃Cl,Zr(OC₃H₇)₂Cl₂, Zr(OC₄H₉)₃Cl, Zr(OC₄H₉)₂Cl₂, Zr(OC₆H₅)₃Cl, orZr(OC₆H₅)₂Cl₂; alternatively, Zr(OCOCH₃)₄, Zr(OCOCH₃)₃Cl,Zr(OCOCH₃)₂Cl₂, Zr(OCOC₂H₅)₄, Zr(OCOC₂H₅)₃Cl, Zr(OCOC₂H₅)₂Cl₂,Zr(OCOC₃H₇)₄, Zr(OCOC₃H₇)₃Cl, Zr(OCOC₃H₇)₂Cl₂, Zr(OCOC₄H₉)₄,Zr(OCOC₄H₉)₃Cl, Zr(OCOC₄H₉)₂Cl₂, Zr(OCOC₆H₅)₄, Zr(OCOC₆H₅)₃Cl, orZr(OCOC₆H₅)₂Cl₂; alternatively, Zr(OCOCH₃)₄, Zr(OCOC₂H₅)₄, Zr(OCOC₃H₇)₄,Zr(OCOC₄H₉)₄, or Zr(OCOC₆H₅)₄; alternatively, Zr(OCOCH₃)₃Cl,Zr(OCOCH₃)₂Cl₂, Zr(OCOC₂H₅)₃Cl, Zr(OCOC₂H₅)₂Cl₂, Zr(OCOC₃H₇)₃Cl,Zr(OCOC₃H₇)₂Cl₂, Zr(OCOC₄H₉)₃Cl, Zr(OCOC₄H₉)₂Cl₂, Zr(OCOC₆H₅)₃Cl, orZr(OCOC₆H₅)₂Cl₂; alternatively, Zr(OSO₃CH₃)₄, Zr(OSO₃C₂H₅)₄,Zr(OSO₃C₃H7)₄, Zr(OSO₃C₄H₉)₄, or Zr(OSO₃C₆H₅)₄; alternatively,Zr(H₃CCOCHCOCH₃)₄, ZrCl₂(H₃CCOCHCOCH₃)₂, Zr((H₅C₆)COCHCO(C₅H₅))₄, orZrCl₂((H₅C₆)COCHCO(C₅H₅))₂; alternatively, Zr(H₃CCOCHCOCH₃)₄, orZr((H₅C₆)COCHCO(C₅H₅))₄; alternatively, ZrCl₂(H₃CCOCHCOCH₃)₂ or ZrCl₂4H₅C₆)COCHCO(C₅H₅))₂; or alternatively, Zr((CH₃)₂N)₄, Zr((C₂H₅)₂N)₄, orZr((C₃H₇)₂N)₄, Zr(C₄H₉)₂N)₄. In other aspects, the zirconium compoundcan comprise, can consist essentially of, or can be, ZrCl₄;alternatively, Zr(OC₂H₅)₄; alternatively, Zr(OC₃H₇)₄; alternatively,Zr(OC₄H₉)₄; alternatively, Zr(OC₆H₅)₄; alternatively, Zr(OCOCH₃)₄;alternatively, Zr(OCOC₂H₅)₄; alternatively, Zr(OCOC₃H₇)₄; alternatively,Zr(OCOC₄H₉)₄; alternatively, Zr(OCOC₆H₅)₄; alternatively, Zr(OSO₃CH₃)₄;alternatively, Zr(OSO₃C₂H₅)₄; alternatively, Zr(OSO₃C₃H₇)₄;alternatively, Zr(OSO3C₄H₉)₄; or alternatively, or Zr(OSO₃C₆H₅)₄.

Generally, the hydrocarbylmetal compound can be any hydrocarbylmetalcompound which in conjunction with the zirconium compound can form anoligomer product when contacted with ethylene. The hydrocarbylmetalcompound of the catalyst system can comprise, can consist essentiallyof, or can he, any heteroleptic or homoleptic hydrocarbylmetal compound.In an aspect, the hydrocarbylmetal can have the formula(R¹)_(a)M(X²)_(b) where R¹ is a hydrocarbyl group, X² is a halide orhydrocarboxide, M is a metal, a ranges from 1 to 4, b ranges from 0 to3, and a+b equal the oxidation state of the metal, M. In an aspect, themetal of the hydrocarbylmetal compound can comprise, can consistessentially of, or can consist of, a group 1, 2, 11, 12, 13, or 14metal; alternatively, a group 1 or 2 metal; alternatively, a group 12,13, or 14 metal; or alternatively, a group 12 or 13 metal;alternatively, a group 1 metal; alternatively, a group 2 metal;alternatively, a group 12 metal; or alternatively, a group 13. In someaspects, the metal of the hydrocarbylmetal compound can comprise, canconsist essentially of, or can be, lithium, sodium, potassium,magnesium, copper, zinc, aluminum, or tin; alternatively, lithium,sodium, potassium, or magnesium; alternatively, zinc, aluminum, or tin;alternatively, lithium; alternatively, sodium; alternatively, potassium;alternatively, magnesium; alternatively, zinc; alternatively, aluminum;or alternatively, tin.

The hydrocarbyl group of the hydrocarbylmetal compound can be a C₁ toC₂₀, a C₁ to C₁₀, or a C₁ to C₆ hydrocarbyl group. In an aspect, thehydrocarbyl group of the hydrocarbylmetal compound can be an alkylgroup, a cycloalkyl group, an aryl group, or an aralkyl group;alternatively, be an alkyl group; alternatively, a cycloalkyl group;alternatively, an aryl group; or alternatively, an aralkyl group. Thealkyl group of the hydrocarbylmetal compound can be a C₁ to C₂₀, a C₁ toC₁₀, or a C₁ to C₆ alkyl group. The cycloalkyl group of thehydrocarbylmetal compound can be a C₄ to C₂₀, a C₄ to C₁₅, or a C₄ toC₁₀ cycloalkyl group. The aryl group of the hydrocarbylmetal compoundcan be a C₆ to C₂₀, a C₆ to C₁₅, or a C₆ to C₁₀ aryl group. The aralkylgroup of the hydrocarbylmetal compound can be a C₇ to C₂₀, a C₇ to C₁₅,or a C₇ to C₁₀ aralkyl group.

In any aspect disclosed herein, the hydrocarbylmetal compound of thecatalyst system can be an alkylmetal compound (i.e., a hydrocarbylmetalcompound where R¹ is an alkyl group. in an embodiment, the alkylmetalcompound of the catalyst system can comprise, can consist essentiallyof, or can be, an alkyllithium (R¹Li), an alkylsodium (R¹Na), analkylpotassium (R¹K), an alkylmagnesium compound (R¹ ₂Mg or R¹MgX²), analkylcopper compound (R¹ ₂Cu or R¹CuX²), an alkylzinc compound. (R¹ ₂Znor R¹ZnX²), an alkyltin compound (R¹ ₄Sn, R¹ ₂Sn, R¹ ₃SnX², R¹ ₂SnX² ₂,R¹ ₂SnX² ₃, R¹ ₂Sn, or R¹SnX²), or an alkylaluminum compound (AlX² ₂R¹,AlX²R¹ ₂, AlR² ₃, Al₂X² ₅R¹, Al₂X² ₃(R¹)₃, or Al₂X²R¹ ₅); alternatively,an alkyllithium (R¹Li), an alkylsodium (R¹Na), an alkylpotassium (R¹K),an alkylmagnesium compound (R¹ ₂Mg or R¹MgX²), an alkylzinc compound (R¹₂Zn or R¹ZnX²), or an alkylaluminum compound (AlX² ₂R¹, AlX²R¹ ₂, AlR¹₃, Al₂X² ₅R¹, AlX² ₃R¹ ₃, or Al₂X²R¹ ₅); alternatively, an alkyllithium(R¹Li), an alkylsodium (R¹Na), or an alkylpotassium (R¹K);alternatively, an alkyllithium (R¹Li); alternatively, an alkylsodium(R¹Na); alternatively, an alkylmagnesium compound (R¹ ₂Mg or R¹MgX²);alternatively, an alkylzinc compound (R¹ ₂Zn or R¹ZnX²); alternatively,an alkyltin compound (R¹ ₄Sn, R¹ ₂Sn, R¹ ₃SnX², R¹ ₂SnX² ₂, R¹ ₂SnX² ₃,R¹ ₂Sn, or R¹SnX²); or alternatively, an alkylaluminum compound (AlX²₂R¹, AlX²R¹ ₂; AlR¹ ₃, Al₂X² ₅R¹, Al₂X² ₃R¹ ₃, or Al₂X²R¹ ₅). In someaspects, the alkylmetal compound of the catalyst system can comprise,can consist essentially of, or can be, an alkyllithium (R¹Li), analkylsodium (R¹Na), an alkylpotassium (R¹K), an alkylmagnesium halide(R¹MgX²), a dialkylmagnesium (R¹ ₂Mg), an alkylcopper halide (R¹CuX²), adialkylcopper (R¹ ₂Cu), an alkylzinc halide (R¹ZnX²), a dialkylzinc (R¹₂Zn), an alkyltin halide (R¹ ₃SnX², R¹ ₂SnX² ₂, R¹ ₂SnX² ₃, R¹ ₂Sn, orR¹SnX²), a diakyltin (R¹ ₂Sn), a tetraalkyltin (R¹ ₄Sn), analkylaluminum dihalide (AlX² ₂R¹), a dialkylaluminum halide (AlX²R¹ ₂),a trialkylaluminum (AlR¹ ₃), an alkylaluminum sesquihalide (Al₂X² ₃R¹₃), an alkylaluminum dialkoxide (AlX² ₂R¹), a dialkylaluminum alkoxide(AlX²R¹ ₂), or an aluminoxane; alternatively, an alkyllithium (R¹Li), analkylsodium (R¹Na), an alkylpotassium (R¹K), a dialkylmagnesium (R¹₂Mg), a dialkylzinc (R¹ ₂Zn), an alkylaluminum dihalide (AlX² ₂R¹), adialkylaluminum halide (AlX²R¹ ₂), a trialkylaluminum (AlR¹ ₃), or analkylaluminum sesquihalide (Al₂X² ₃R¹ ₃); alternatively, an alkyllithium(R¹Li), an alkylsodium (R¹Na), an alkylpotassium (R¹K); alternatively,an alkylmagnesium halide (R¹MgX²) or a dialkylmagnesium (R¹ ₂Mg);alternatively, a diakyltin (R¹ ₂Sn), a tetraalkyl tin (R¹ ₄Sn);alternatively, an alkylzinc compound (R¹ ₂Zn or R¹ZnX²) and analkylaluminum compound (AlX² ₂R¹, AlX²R¹ ₂, AlR¹ ₃, Al₂X² ₅R¹, Al₂X² ₃R¹₃, or Al₂X²R¹ ₅): alternatively, an alkylaluminum dihalide (AlX² ₂R¹), adialkylaluminum halide (AlX²R¹ ₂), an alkylaluminum sesquihalide (Al₂X²₃R¹ ₃), a trialkylaluminum (AlR¹ ₃), or an aluminoxane; alternatively,an alkyllithium (R¹Li); alternatively, an alkylsodium (R¹Na);alternatively, an alkylpotassium (R¹K); alternatively, an alkylmagnesiumhalide (R¹MgX²); alternatively, a dialkylmagnesium (R¹ ₂Mg);alternatively, an alkylzinc halide (R¹ZnX²); alternatively, adialkylzinc (R¹ ₂Zn); alternatively, an alkylaluminum dihalide (AlX²₂R¹); alternatively, a dialkylaluminum halide (AlX²R¹ ₂); alternatively,an alkylaluminum sesquihalide (Al₂X² ₃R¹ ₃); alternatively, analkylaluminun dialkoxide (AlX² ₂R¹); alternatively, a dialkylaluminumalkoxide (AlX²R¹ ₂); alternatively, a trialkylaluminum (AlR¹ ₃); oralternatively, an aluminoxane.

Generally, each halide of any hydrocarbylmetal halide (or alkylmetalhalide) can be any halide. Each halide of any alkylmetal halidedisclosed herein independently can be fluoride, chloride, bromide, oriodide; alternatively, chloride, bromide, or iodide; alternatively,fluoride; alternatively, chloride; alternatively, bromide; oralternatively, iodide.

Each alkyl group of any alkylmetal compound disclosed hereinindependently can be a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ to C₆ alkylgroup. In an aspect, each alkyl group of any alkylmetal compounddisclosed herein independently can be a methyl group, an ethyl group, apropyl group, a butyl group, a pentyl group, a hexyl group, a heptylgroup, or an octyl group; alternatively, a methyl group, an ethyl group,a butyl group, a hexyl group, or an octyl group. In some aspects, eachalkyl group(s) of any alkylmetal compound disclosed herein independentlycan be a methyl group, an ethyl group, an n-propyl group, an n- butylgroup, an iso-butyl group, an n-hexyl group, or an n-octyl group;alternatively, a methyl group, an ethyl group, an n-butyl group, or aniso-butyl group; alternatively, a methyl group; alternatively, an ethylgroup; alternatively, an n-propyl group; alternatively, an n-butylgroup; alternatively, an iso-butyl group; alternatively, an n-hexylgroup; or alternatively, an n-octyl group.

Each alkoxide of any alkylmetal alkoxide disclosed herein independentlycan be a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ to C₆ alkoxide. In an aspect,each alkoxide of any alkylmetal alkoxide disclosed herein independentlycan be a methoxide, an ethoxide, a propoxide, a butoxide, a pentoxide, ahexoxide, a heptoxide, or an octoxide; alternatively, a methoxide, anethoxide, a butoxide, a hexoxide, or an octoxide. In some aspects, eachalkoxide group of any alkylmetal alkoxide disclosed herein independentlycan be a methoxide, an ethoxide, an n-propoxide, an n-butoxide, aniso-butoxide, an n-hexoxide, or an n-octoxide; alternatively, amethoxide, an ethoxide, an n-butoxide, or an iso-butoxide;alternatively, a methoxide; alternatively, an ethoxide; alternatively,an n-propoxide; alternatively, an n-butoxide; alternatively, aniso-butoxide; alternatively, an n-hexoxide; or alternatively, ann-octoxide.

The hydrocarbyllithium compound (or alkyllithium compound) which can beutilized as the hydrocarbylmetal compound can comprise, can consistessentially of, or can be, methyllithium, n-butyllithium,sec-butyllithium, tert-butyllithium; alternatively, methyllithium;alternatively, n-butyllithium; alternatively, sec-butyllithium; oralternatively, tert-butyllithium. The hydrocarbylsodium compound (oralkylsodium compound) which can be utilized as the hydrocarbylmetalcompound can comprise, can consist essentially of, or can be,methylsodium, n-butylsodium, sec-butylsodium, tert-butylsodium;alternatively, methylsodium; alternatively, n-butylsodium;alternatively, sec-butylsodium; or alternatively, tert-butylsodium. Thehydrocarbylpotassium compound (or alkylpotassium compound) which can beutilized as the hydrocarbylmetal compound can comprise, can consistessentially of, or can be, methylpotassium, n-butylpotassium,sec-butylpotassium, tert-butylpotassium; alternatively, methylpotassium;alternatively, n-butylpotassium; alternatively, sec-butylpotassium; oralternatively, tert-butylpotassium.

The hydrocarbylmagnesium halide (or alkylmagnesium halide) which can beutilized as the hydrocarbylmetal compound can comprise, can consistessentially of, or can be, methylmagnesium halide, ethylmagnesiunhalide, a propylmagnesium halide, or a butylmagnesium halide;alternatively, methylmagnesium halide; alternatively, ethylmagnesiunhalide; alternatively, a propylmagnesium halide; alternatively, abutylmagnesium halide. The dihydrocarbylmagnesium (or dialkylmagnesium)which can be utilized as the hydrocarbylmetal compound can comprise, canconsist essentially of, or can be, dimethylmagnesium, diethylmagnesium,a dipropyl magnesium, or a dibutylmagnesium; alternatively,dimethylmagnesium; alternatively, diethylmagnesium; alternatively, adipropylmagnesium; or alternatively, a dibutylmagnesium.

The hydrocarbylzinc halide which can be utilized as the hydrocarbylmetalcompound can comprise, can consist essentially of, or can be, amethylzinc halide, an ethylzinc halide, a propylzinc halide, a butylzinchalide, a pentylzinc halide, a hexylzince halide, a cyclopentylzinchalide, a cyclohexylzinc halide, a phenyl zinc halide, a toulylzinchalide, a xylylzinc halide, or a benzylzinc halide; alternatively, amethylzinc halide, an ethylzinc halide, a propylzinc halide, a butylzinchalide, a pentylzinc halide, or a hexylzince halide; alternatively, acyclopentylzinc halide or a cyclohexylzinc halide; alternatively, aphenyl zinc halide, a toulylzinc halide, or a xylylzinc halide;alternatively, a methylzinc halide; alternatively, an ethylzinc halide;alternatively, a propylzinc halide; alternatively, a butylzinc halide;alternatively, a pentylzinc halide; alternatively, a hexylzince halide;alternatively, a cyclopentylzinc halide; alternatively, a cyclohexylzinchalide; alternatively, a phenyl zinc halide; alternatively, a toulylzinchalide; alternatively, a xylylzinc halide; or alternatively, abenzylzinc halide. The dihydrocarbylzinc which can be utilized as thehydrocarbylmetal compound can comprise, can consist essentially of, orcan be, dimethylzinc, diethylzinc, a dipropylzinc, dibutylzinc, adipentylzinc, a dihexylzinc, dicyclopenylzinc, dicyclohexylzinc,diphenylzinc, a ditoulylzinc, a dixylylzinc, or dibenzylzinc;alternatively, dimethylzinc, diethylzinc, a dipropylzinc, dibutylzinc, adipentylzinc, or a dihexylzinc; alternatively, dicyclopentylzinc ordicyclohexylzinc; alternatively, diphenylzinc, a ditoulylzinc, adixylylzinc; alternatively, or dibenzylzinc; alternatively,dimethylzinc; alternatively, diethylzinc; alternatively, a dipropylzinc;alternatively, dibutylzinc; alternatively, a dipentylzinc;alternatively, a dihexylzinc; alternatively, dicyclopenylzinc;alternatively, dicyclohexylzinc; alternatively, diphenylzinc;alternatively, a ditoulylzinc; alternatively, a dixylylzinc; oralternatively, dibenzylzinc.

In an aspect, the hydrocarbylmetal compound in the catalyst system canbe an alkylaluminum compound. Generally, the hydrocarbylaluminumcompound which can be utilized as the hydrocarbylmetal compound in thecatalyst system can have the formula AlX² _(3−n)R¹ _(n), Al₂X² _(6−q—)R¹_(q), or any combination thereof; alternatively, AlX² _(n)R¹ _(3−n); oralternatively Al₂X² _(q)R¹ _(6−q). X², R¹, n, and q of the formulas AlX²_(3−n)R¹ _(n) and Al₂X² _(6−q−)R¹ _(q) are independent elements of thehydrocarbylaluminum compound having the formulas AlX² _(3−n)R¹ _(n) andAl₂X² _(6−q−)R¹ _(q) and are independently described herein. Theindependent descriptions of X², R¹, n, and q can be utilized withoutlimitation, and in any combination, to describe the hydrocarbylaluminumcompounds having the formula AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q).Within the formulas AlX² _(3−n)R¹ _(n) and Al₂X² _(6−q)R¹ _(q), each R¹independently can be a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ to C₆ hydrocarbylgroup; or alternatively, a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ to C₆ alkylgroup (in which case the hydrocarbyl aluminum compound can be referredto as an alkylaluminum compound). In an aspect. each R¹ independentlycan be a methyl group, an ethyl group, a propyl group, a butyl group, apentyl group, a hexyl group, a heptyl group, or an octyl group;alternatively, a methyl group, an ethyl group, a butyl group, a hexylgroup, an octyl group; alternatively, a methyl group, an ethyl group, ann-propyl group, an n-butyl group, an iso-butyl group, an n-hexyl group,or an n-octyl group; alternatively, a methyl group, an ethyl group, ann-butyl group, or an iso-butyl group; alternatively, a methyl group;alternatively, an ethyl group; alternatively, an n-propyl group;alternatively, an n-butyl group; alternatively, an iso-butyl group;alternatively, an n-hexyl group; or alternatively, an n-octyl group.Within the formulas AlX² _(3−n)R¹ _(n) and Al₂X² _(6−q)R¹ _(q), each X²independently can be fluoride, chloride, bromide, or iodide;alternatively, chloride, bromide, or iodide; alternatively, chloride;alternatively, bromide; or alternatively iodide. Within the formulasAlX² _(3−n)R¹ _(n) and Al₂X² _(6−q)R¹ _(q), n can be in a range from 1to 3; alternatively, in a range from 1 to 2; alternatively, 1;alternatively, 2, or alternatively, 3. Within the formulas AlX² _(3−n)R¹_(n) and Al₂X² _(6−q)R¹ _(q), q can be 1, 3, or 5; alternatively, 1;alternatively, 3; or alternatively, 5. In an aspect, thehydrocarbylaluminum (or alkylaluminum) compound having the formula AlX²_(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q), can comprise, consist essentiallyof, or can be, a trialkylaluminum, an alkylaluminum halide, or anycombination thereof; alternatively, a trialkylaluminum; oralternatively, an alkylaluminum halide. The trialkylaluminum compoundcan comprise, can consist essentially of, or can be, trimethylaluminum,triethylaluminum, tripropylaluminum, tributylaluminum, trihexylaluminum,trioctylaluminum, or any combination thereof; alternatively,trimethylaluminum, triethylaluminum, tripropylaluminum,tri-n-butylaluminum, tri-isobutylaluminum, trihexylaluminum,tri-n-octylaluminum, or mixtures thereof; alternatively,triethylaluminum, tri-n-butylaluminum, tri-isobutylaluminum,trihexylaluminum, tri-n-octylaluminum, or any combination thereof;alternatively, triethylaluminum, tri-n-butylaluminum, trihexylaluminum,tri-n-octylaluminum, or any combination thereof; alternatively,trimethylaluminum; alternatively, triethylaluminum; alternatively,tripropylaluminum; alternatively, tri-n-butylaluminum; alternatively,tri-isobutylaluminum; alternatively, trihexylaluminum; or alternatively,tri-n-octylaluminum. The alkylaluminum halide can comprise, can consistessentially of, or can be, diethylaluminum chloride, diethylaluminumbromide, ethylaluminum dichloride, ethylaluminum sesquichloride, or anycombination thereof; alternatively, diethylaluminum chloride,ethylaluminum dichloride, ethylaluminum sesquichloride, or anycombination thereof; alternatively, diethylaluminum chloride;alternatively, diethylaluminum bromide; alternatively, ethylaluminumdichloride; or alternatively, ethylaluminum sesquichloride.

In some aspects, the hydrocarbylaluminum (or alkylaluminum) compoundwhich can be utilized as the hydrocarbylmetal compound in the catalystsystem can have the formula AlX² _(3−n)R¹ _(n), Al₂X² _(6−q−)R¹ _(q), orany combination thereof (alternatively, AlX² _(n)R¹ _(3−n); oralternatively Al₂X² _(q)R¹ _(6−q)) wherein at least a portion of (or allof) the X²s can be an alkoxide, a carboxylate, a dihydrocarbylazanide,or an carboxamide anion; alternatively, alkoxide; alternatively, acarboxylate; alternatively, a dihydrocarbylazanide; or alternatively, oran carboxamide anion. R¹, n, and q of the formulas AlX² _(3−n)R¹ _(n)and Al₂X² _(6−q−)R¹ _(q) are described herein as elements of thehydrocarbylaluminum (or alkylaluminum) compound and these independentdescriptions of R¹, n, and q can be utilized without limitation, and inany combination, to describe the hydrocarbylaluminum compounds havingthe formula AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q) where at least aportion of (or all of) the X²s are an alkoxide, a carboxylate, adihydrocarbylazanide, and/or an carboxamide anion. When only a portionof (or all of) the X²s are an alkoxide, a carboxylate, adihydrocarbylazanide, and/or an carboxamide anion, the remainder of theX²s can be a halide; alternatively, fluoride, chloride, bromide, oriodide; alternatively, chloride, bromide, or iodide; alternatively,chloride; alternatively, bromide; or alternatively iodide. Specificalkoxides, for hydrocarbylaluminum (or alkylaluminum) compounds havingthe formula AlX² _(3−n)R¹ _(n) and/or Al₂X² _(6−q−)R¹ _(q) where atleast a portion of (or all of) the X²s can be an alkoxide, can be a C₁to C₂₀, a C₁ to C₁₀, or a C₁ to C₆ alkoxide; alternatively, a methoxide,an ethoxide, a propoxide, a butoxide, a pentoxide, a hexoxide, aheptoxide, or an octoxide; alternatively, a methoxide, a ethoxide, abutoxide, a hexoxide, or an octoxide; alternatively, a methoxide, anethoxide, an n-propoxide, an n-butoxide, an iso-butoxide, an n-hexoxide,or an n-octoxide; alternatively, a methoxide, an ethoxide, ann-butoxide, or an iso-butoxide; alternatively, a methoxide;alternatively, an ethoxide; alternatively, an n-propoxide;alternatively, an n-butoxide; alternatively, an iso-butoxide;alternatively, an n-hexoxide; or alternatively, an n-octoxide. Specificcarboxylates, for hydrocarbylaluminum (or alkylaluminum) compoundshaving the formula AlX² _(3−n)R¹ _(n) and/or Al₂X² _(6−q−)R¹ _(q) whereat least a portion of (or all of) the X²s can be an carboxylate, can beC₂ to C₂₀, C₂ to C₁₀, or C₂ to C₆ carboxylate; alternatively acetate,propanoate, a butanoate, a pentonate, a hexanoate, a heptanoate,octanoate, a benzoate, a methylbenoate, a dimethylbenzoate, orphenylactetate; alternatively, acetate, propanoate, a butanoate, apentonate, a hexanoate, a heptanoate, or octanoate; alternatively,benzoate, a methylbenzoate, or dimethylbenzoate; or alternatively,phenylacetate. Specific dihydrocarbylazanides, for hydrocarbylaluminum(or alkylaluminum) compounds having the formula AlX² _(3−n)R¹ _(n)and/or Al₂X² _(6−q−)R¹ _(q) where at least a portion of (or all of) theX²s can be an dihydrocarbylazanides, can be C₂ to C₂₀, C₂ to C₁₀, or C₂to C₆ dihydrocarbylazanide; alternatively, dimethylazanide,diethylazanide, a dipropylazanide, pyrrolidine azanide, piperidineazanide, diphenylazanide, a ditoluylazanide, a dixylyazanide, ordibenzylazanide; alternatively, dimethylazanide, diethylazanide, or adipropylazanide; alternatively, pyrrolidine azanide or piperidineazanide; alternatively, diphenylazanide, a ditoluylazanide, adixylyazanide; or alternatively dibenzylazanide. Specific carboxamideanions, for hydrocarbylaluminum (or alkylaluminum) compounds having theformula AlX² _(3−n)R¹ _(n) and/or Al₂X² _(6−q−)R¹ _(q) where at least aportion of (or all of) the X²s can be an carboxamide anion, can be C₂ toC₂₀, C₂ to C₁₀, or C₂ to C₆ carboxylamide anion; alternatively,dimethylformamide anion, diethylformamide anion, dimethylacetamideanion, diethylacetamide anion, 2-pyrrolidone anion, valerolactun anion,or caprolactam anion; alternatively, dimethylformamide anion,diethylfottnamide anion, dimethylacetamide anion, diethylacetamideanion; alternatively, 2-pyrrolidone anion, valerolactam anion, orcaprolactam anion; alternatively, dimethylformamide anion;alternatively, dimethylacetamide anion; alternatively, 2-pyrrolidoneanion; alternatively, valerolactam anion; or alternatively, caprolactamanion. When at least a portion of (or all of) the X²s of thehydrocarbylaluminum (or alkylaluminum) compounds having the formula AlX²_(3−n)R¹ _(n) and/or Al₂X² _(6−q−)R¹ _(q) are an alkoxide, acarboxylate, a dihydrocarbylazanide, and/or an carboxamide anion themolar ratio of alkoxide, carboxide, azanide, and/or amide anion toaluminum can be in a range from 0.1:1 to 1:1, 0.1:1 to 0.75:1, or from0.1:1 to 0.5:1.

In aspects, where the hydrocarbylaluminum (or alkylaluminum) compoundhas the formula AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q) and at leasta portion of (or all of) the X²s are an alkoxide, a carboxylate, adihydrocarbylazanide, and/or an carboxamide anion, thehydrocarbylaluminum (or alkylaluminum) compound having the formula AlX²_(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q) can be generated in situ. These insitu generated hydrocarbylaluminum (or alkylaluminum) compounds can beformed by contacting an appropriate alcohol, a carboxylic acid or asimple ester of a carboxylic acid, an amine, and/or an amide with ahydrocarbylaluminum (or alkylaluminum) compound having the formula AlX²_(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q), where i) each R¹ independentlyany hydrocarbyl or alkyl R¹ group described herein for thehydrocarbylaluminum (or alkylaluminum) compound having the formula AlX²_(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q), ii) each X² independently can beany halide described herein for the hydrocarbylaluminum (oralkylaluminum) compound having the formula AlX² _(3−n)R¹ _(n) or Al₂X²_(6−q−)R¹ _(q), iii) n can have any value described herein for thehydrocarbylaluminum (or alkylaluminum) compound having the formula AlX²_(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q), and iv) q can have any valuedescribed herein for the hydrocarbylaluminum (or alkylaluminum) compoundhaving the formula AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q). Thealcohol that can be utilized to generate the in situ generatedhydrocarbylaluminum (or alkylaluminum) compound can be methanol,ethanol, a propanol, a butanol, a pentanol, a hexanol, a heptanol, or anoctanol; alternatively, methanol, ethanol, a butanol, a hexanol, or anoctanol; alternatively, methanol, ethanol, n-propanol, n-butanol,iso-butanol, n-hexanol, or n-octanol; alternatively, methanol, ethanol,n-butanol, or iso-butanol; alternatively, methanol; alternatively,ethanol; alternatively, n-propanol; alternatively, n-butanol;alternatively, iso-butanol; alternatively, n-hexanol; or alternatively,n-octanol. The carboxylic acid or carboxylic acid of the simple ester ofa carboxylic acid that can be utilized to generate the in situ generatedhydrocarbylaluminum (or alkylaluminum) compound can be C₂ to C₂₀, C₂ toC₁₀, or C₂ to C₆ carboxylic acid; alternatively acetic acid, propionicacid, a butanoic acid, a pentanoic acid, a hexanoic acid, a heptanoicacid, an octanoic acid, benzoic acid, a methylbenzoic acid, adimethylbenzoic acid, or phenylacetic acid; alternatively, acetic acid,propanoic acid, a butanoic acid, a pentanoic acid, a hexanoic acid, aheptanoic acid, or an octanoic acid; alternatively, benzoic acid, amethylbenzoic acid, or a dimethylbenzoic acid; or alternatively,phenylacetic acid. Generally, the alcohol of the alcohol derived portionof the simple ester of a carboxylic acid can be methanol and/or ethanol;alternatively, methanol; or ethanol. The amine that can be utilized togenerate the in situ generated hydrocarbylaluminum (or alkylaluminum)compound having dihydrocarbylazanide can be a C₂ to C₂₀, C₂ to C₁₀, orC₂ to C₆ amine; alternatively, dimethyl amine, diethyl amine, a dipropylamine, pyrrolidine, piperidine, diphenyl amine, a ditoluyl amine, adixyly amine, or dibenzyl amine; alternatively, dimethyl amine, diethylamine, or a dipropyl amine; alternatively, pyrrolidine or piperidine;alternatively, diphenyl amine, a ditoluyl amine, a dixyly amine; oralternatively dibenzyl amine. The amide that can be utilized to generatethe in situ generated hydrocarbylaluminum (or alkylaluminum) compoundhaving carboxamide anions can be a C₂ to C₂₀, C₂ to C₁₀, or C₂ to C₆amide; alternatively, dimethylformamide, diethylformamide,dimethylacetamide, diethylacetamide, 2-pyrrolidone, valerolactam, orcaprolactam; alternatively, dimethylformamide, diethylformamide,dimethylacetamide, diethylacetamide; alternatively, 2-pyrrolidone,valerolactam, or caprolactam; alternatively, dimethylformamide;alternatively, dimethylacetamide; alternatively, 2-pyrrolidone;alternatively, valerolactam; or alternatively, caprolactam. The molarratio of the alcohol, carboxylic acid, carboxylic acid ester, amine,and/or amide to hydrocarbylaluminum (or alkylaluminum) compound havingthe formula AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q) used to theprepare the in situ generated hydrocarbylaluminum (or alkylaluminum)compound having the formula AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q)where at least a portion of (or all of) the X²s are alkoxides, acarboxylates, a dihydrocarbylazanides, and/or an carboxamide anions canbe in a range from 0.1:1 to 1:1, 0.1:1 to 0.75:1, or from 0.1:1 to0.5:1.

Generally, the in situ generated hydrocarbylaluminum (or alkylaluminum)compound having the formula. AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q)can be formed in any way that can produce the desired in situ generatedhydrocarbylaluminum (or alkylaluminum) compound. in an aspect, the insitu generated hydrocarbylaluminum (or alkylaluminum) compound havingthe formula AlX² _(3−n)R¹ _(n) or Al₂X² _(6−q−)R¹ _(q) where at least aportion of (or all of) the X²s are an alkoxide, a carboxylate, adihydrocarbylazanide, and/or an carboxamide anion can be 1) formed bycontacting the alcohol, carboxylic acid or simple ester of a carboxylicacid, amine, and/or amide with the appropriate (or desired)hydrocarbylaluminum (or alkylaluminum) compound having the formula AlX²_(3−n)R¹ _(n) and/or Al₂X² _(6−q−)R¹ _(q) prior to contacting the insitu generated hydrocarbylaluminum (or alkylaluminum) compound with thezirconium compound component of the catalyst system.

The aluminoxane compound which can be utilized as the hydrocarbyl metal(or alkylmetal, or hydrocarbylaluminum, or alkylalutninum) compound ofthe catalyst system can comprise, can consist essentially of, or can be,methylaluminoxane (MAO), ethylaluminoxane, modified methylaluminoxane(MMAO), n-propylaluminoxane, iso-propyl-aluminoxane, n-butylaluminoxane,sec-butylaluminoxane, iso-butylaluminoxane, t-butylaluminoxane,1-pentylaluminoxane, 2-entylaluminoxane, 3-pentyl-aluminoxane,iso-pentylaluminoxane, neopentylaluminoxane, or any combination thereof.In some non-limiting aspects, the aluminoxane can comprise, can consistessentially of, or can be, methylaluminoxane (MAO), modifiedmethylaluminoxane (MMAO), isobutyl aluminoxane, t-butyl aluminoxane, orany combination thereof; alternatively, methylaluminoxane (MAO);alternatively, ethylaluminoxane; alternatively, modifiedmethylaluminoxane (MMAO); alternatively, n-propylaluminoxane;alternatively, iso-propylaluminoxane; alternatively, n-butylaluminoxane;alternatively, sec-butylaluminoxane; alternatively,iso-butylaluminoxane; alternatively, t-butyl aluminoxane; alternatively,1-pentyl-aluminoxane; alternatively, 2-pentylaluminoxane; alternatively,3-pentylaluminoxane; alternatively, iso-pentylaluminoxane; oralternatively, neopentylaluminoxane.

Non-limiting exemplary hydrocarbylaluminum (or alkylaluminum) compoundswhich can be utilized in the catalyst systems of the processes describedherein can comprise, can consist essentially of, or can be Al(CH₃)₃,Al(C₂H₅)₃, Al(C₃H₇)₃, Al(C₄H₉)₃, Al(C₅H₁₁)₃, Al(C₆H₁₃)₃, Al(C₈H₁₇)₃,Al(C₂H₅)₂Cl, Al(C₂H₅)₂Br, Al(C₂H₅)₂I, Al(C₂H₅)Cl₂, Al(C₂H₅)Br₂,Al(C₂H₅)I₂, AlC₂H₅(OC₂H₅)₂, AlC₂H₅(OC₃H₇)₂, AlC₂H₅(OC₄H₉)₂,Al(OC₂H₅)₂Cl, Al(OC₃H₇)₂Cl, Al(OC₄H₉)₂Cl, Al(OC₂H₅)Cl₂, Al(OC₃H₇)Cl₂,Al(OC₄H₉)Cl₂, AlC₂H₅(OCOC₂H₅)₂, AlC₂H₅(OCOC₃H₇)₂, AlC₂H₅(OCOC₄H₉)₂,Al(OCOC₂H₅)₂Cl, Al(OCOC₃H₇)₂Cl, Al(OCOC₄H₉)₂Cl, Al(OCOC₂H₅)Cl₂,Al(OCOC₃H₇)Cl₂, Al(OCOC₄H₉)Cl₂, Al(C₂H₅)₂OC₂H₅, Al(C₂H₅)₂OC₃H₇,Al(C₂H₅)₂OC₄H₉, Al(C₂H₅)₂N(C₂H₅)₂, Al(C₂H₅)₂N(C₃H₇)₂, Al(C₂H₅)₂N(C₄H₉)₂,Al₂(CH₃)₃Cl₃, Al₂(CH₃)₃Br₃, Al₂(C₂H₅)₃Cl₃, Al₂(C₂H₅)₃Br₃, Al₂(C₂H₅)₃I₃,Al₂(C₂H₅)₂BrCl₂, Al₂(C₃H₇)₃Cl₃, Al₂(C₄H₉)₃Cl₃, Al₂(C₅H₇)₃Cl₃,Al₂(OCOC₄H₉)₃Cl₃, or any combination thereof. In some aspects, thehydrocarbylaluminum (or alkylaluminum) compound can comprise, canconsist essentially of, or can be, Al(CH ₃)₃, Al(C₂H₅)₃, Al(C₃H₇)₃,Al(C₄H₉)₃, Al(C₅H₁₁)₃, Al(C₆H₁₃)₃, Al(C₈H₁₇)₃, Al(C₂H₅)₂Cl, Al(C₂H₅)₂Br,Al(C₂H₅)₂I, Al(C₂H₅)Cl₂, Al(C₂H₅)Br₂, Al(C₂H₅)I₂, Al₂(CH₃)₃Cl₃,Al₂(CH₃)₃Br₃, Al₂(C₂H₅)₃Cl₃, Al₂(C₂H₅)₃Br₃, Al₂(C₂H₅)₃I₃,Al₂(C₂H₅)₂BrCl₂, Al₂(C₃H₇)₃Cl₃, Al₂(C₄H₉)₃Cl₃, Al₂(C₅H₇)₃Cl₃, or anycombination thereof; alternatively, AlC₂H₅(OC₂H₅)₂, AlC₂H₅(OC₃H₇)₂,AlC₂H₅(OC₄H₉)₂, AlC₂H₅(OCOC₂H₅)₂, AlC₂H₅(OCOC₃H₇)₂, AlC₂H₅(OCOC₄H₉)₂,Al(C₂H₅)₂OC₂H₅, Al(C₂H₅)₂OC₃H₇, Al(C₂H₅)₂OC₄H₉, Al(C₂H₅)₂N(C₂H₅)₂,Al(C₂H₅)₂N(C₃H₇)₂, Al(C₂H₅)₂N(C₄H₉)₂, or any combination thereof;alternatively, AlC₂H₅(OC₂H₅)₂, AlC₂H₅(OC₃H₇)₂, AlC₂H₅(OC₄H₉)₂, or anycombination thereof; or alternatively, AlC₂H₅(OCOC₂H₅)₂,AlC₂H₅(OCOC₃H₇)₂, AlC₂H₅(OCOC₄H₉)₂, Al(C₂H₅)₂OC₂H₅, Al(C₂H₅)₂OC₃H₇,Al(C₂H₅)₂OC₄H₉, or any combination thereof; alternatively, Al(C₂H₅)₂N(C₂H₅)₂, Al(C₂H₅)₂N(C₃H₇)₂, Al(C₂H₅)₂N(C₄H₉)₂, or anycombination thereof. In other aspects, the hydrocarbylaluminum (oralkylaluminum) compound can comprise, can consist essentially of, or canbe, Al₂(CH₃)₃Cl₃, Al₂(CH₃)₃Br₃, Al₂(C₂H₅)₃Cl₃, Al₂(C₂H₅)₃Br₃,Al₂(C₂H₅)₃I₃, Al₂(C₂H₅)₂BrCl₂, Al₂(C₃H₇)₃Cl₃, Al₂(C₄H₉)₃Cl₃,Al₂(C₅H₇)₃Cl₃, or any combination thereof; or alternatively, Al(C₂H₅)₃,Al(C₂H₅)₂Cl, Al(C₂H₅)Cl₂, Al₂(C₂H₅)₃Cl₃, or any combination thereof.

The molar ratio of the metal of the hydrocarbylmetal (orhydrocarbylaluminum, or alkylaluminum) compound to zirconium of thezirconium compound (also referred to herein as the M:Zr molar ratio) tocan be any value that provides a catalyst system which can form anoligomer product. in an aspect, the minimum M:Zr (or Al:Zr) molar ratiocan be 0.1:1, 0.2:1, 0.6:1, 1:1, 2:1 10:1; alternatively, oradditionally, the maximum M:Zr (or Al:Zr) molar ratio can be 100:1 75:1,50:1 25:1, 15:1, or 10:1. Generally, the M:Zr (or Al:Zr) molar ratio canrange from any minimum M:Zr (or Al:Zr) molar ratio disclosed herein toany maximum M:Zr (or Al:Zr) molar ratio disclosed herein. Accordingly,suitable non-limiting ranges for the M:Zr (or Al:Zr) molar ratios canrange from 0.1:1 to 100:1, 0.2:1 to 75:1, 0.6:1 to 25:1, 1:1 to 50:1,2:1 to 25:1, 1:1 to 15:1, 2:1 to 10:1, 10:1 to 50:1, or 10:1 to 25:1.Other appropriate M:Zr (or Al:Zr) molar ranges are readily apparent fromthis disclosure.

In some aspects, the catalyst system can further comprise (or have as acomponent) a neutral non-ionic organic modifier. Generally, the neutralnon-ionic organic modifier can be any neutral non-ionic organic modifierwhich in conjunction with the zirconium compound and thehydrocarbylmetal compound can form an oligomer product. The neutralnon-ionic organic modifier can comprise, consist essentially of, or canbe, an ether, an ester, a ketone, an aldehyde, an alcohol, an anhydride,an acid chloride, a nitrile, a sulfide, a disulfide, a phosphine, anamine, or an amide; alternatively, an ether; alternatively, an ester,alternatively, a ketone; alternatively, an aldehyde; alternatively, analcohol; alternatively, a sulfide; alternatively, a disulfide,alternatively, a nitrile; alternatively, a phosphine; alternatively, anamine; or alternatively, an amine.

The ether which can be utilized as the neutral non-ionic organicmodifier can be, a C₂ to C₂₀, C₂ to C₁₅, or C₂ to C₁₀, ether. Thesulfide which can be utilized as the neutral non-ionic organic modifiercan be, can be a C₂ to C₂₀, C₂ to C₁₅, or C₂ to C₁₀ sulfide. Thedisulfide which can be utilized as the neutral non-ionic organicmodifier can be, can be a C₂ to C₂₀, C₂ to C₁₅, or C₂ to C₁₀ disulfide.The ether can have structure R¹¹OR¹². The sulfide can have structureR¹¹SR¹². The disulfide can have structure R¹¹SSR¹². Each R¹¹ and R¹² ofthe ether, sulfide, and/or disulfide independently can be C₁ to C₁₅, C₁to C₁₀, or C₁ to C₅ hydrocarbyl groups, C₁ to C₁₅, C₁ to C₁₀, or C₁ toC₅ alkyl groups, C₅ to C₁₅ or C₅ to C₁₀ cycloalkyl groups, C₆ to C₁₅ orC₆ to C₁₀ aryl groups, or C₇ to C₁₅ or C₇ to C₁₀ aralkyl groups. In anon-limiting aspect, the ether which can be utilized as the neutralnon-ionic organic modifier can comprise, can consist essentially of, orcan be, dimethyl ether, diethyl ether, a dipropyl. ether, a dibutylether, diphenyl ether, a ditolyl ether, a dixylyl ether,tetrahydrofuran, tetrahydropyran, a dioxane, furan, benzofuran,isobenzofuran, dibenzofuran, or any combination thereof. In someaspects, the ether which can be utilized as the neutral non-ionicorganic modifier can comprise, can consist essentially of, or can be,dimethyl ether, diethyl ether, a di.propyl ether, a dibutyl ether,diphenyl ether, a ditolyl ether, a dixylyl ether, or any combinationthereof; alternatively, tetrahydrofuran, tetrahydropyran, a dioxane, orany combination thereof; alternatively, furan, benzofuran,isobenzofuran, dibenzofuran, or any combination thereof alternatively,diethyl ether; alternatively, a dipropyl ether; alternatively, a dibutylether; alternatively, diphenyl ether; alternatively, alternatively, aditolyl ether; alternatively, a dixylyl ether, tetrahydrofuran;alternatively, tetrahydropyran; alternatively, a dioxane; alternatively,furan; alternatively, benzofuran; alternatively, isobenzofuran; oralternatively, dibenzofuran. In a non-limiting aspect, the sulfide whichcan be utilized as the neutral non-ionic organic modifier can comprise,consist essentially of, or can be, dimethyl sulfide, diethyl sulfide, adipropyl sulfide, a dihexyl sulfide, a dioctyl sulfide, dicyclohexylsulfide, diphenyl sulfide, thiophene, a methyl thiophene (e.g., 2-methylthiophene or 3-methyl thiophene), a dimethyl thiophene (e.g.,2,3-dimethyl thiophene), an ethyl thiophene, benzothiophene,tetrahydrothiophene, thiopyran, or any combination thereof;alternatively, alternatively, dimethyl sulfide, diethyl sulfide, adipropyl sulfide, a dibutyl sulfide, a dihexyl sulfide, a dioctylsulfide, dicyclohexyl sulfide, diphenyl sulfide, or any combinationthereof; alternatively thiophene, a methyl thiophene (e.g., 2-methylthiophene or 3-methyl thiophene), a dimethyl thiophene (e.g.,2,3-dimethyl thiophene), an ethyl thiophene, benzothiophene,tetrahydrothiophene, thiopyran, or any combination thereof;alternatively, dimethyl sulfide; alternatively, diethyl sulfide;alternatively, dibutyl sulfide; alternatively, a dihexyl sulfide;alternatively, a dioctyl sulfide; alternatively, dicyclohexyl sulfide;alternatively, diphenyl sulfide; alternatively, thiophene;alternatively, tetrahydrothiophene; or alternatively, thiourea. In anaspect, the disulfide can comprise, consist essentially of, or can be,dimethyl disulfide, diethyl disulfide, a dipropyl disulfide, a dibutyldisulfide, a dihexyl disulfide, a dioctyl disulfide, dicyclohexyldisulfide, ethylmethyl disulfide, diphenyl disulfide, methylphenyldisulfide, or any combination thereof; alternatively, dimethyldisulfide, diethyl disulfide, a dipropyl disulfide, a dibutyl disulfide,a dihexyl disulfide, a dioctyl disulfide, dicyclohexyl disulfide,ethylmethyl disulfide, diphenyl disulfide, methylphenyl disulfide, orany combination thereof; alternatively, dimethyl disulfide;alternatively, diethyl disulfide; alternatively, a dibutyl disulfide;alternatively, a dioctyl disulfide; or alternatively, diphenyldisulfide.

The ester which can be utilized as the neutral non-ionic organicmodifier can be a C₃ to C₂₀, C₃ to C₁₅, or C₃ to C₁₀, ester. The estercan have structure R¹³(C═O)OR¹⁴. R¹³ and R¹³ of the ester independentlycan be C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbyl groups, C₁ to C₁₅,C₁ to C₁₀, or C₁ to C₅ alkyl groups, C₅ to C₁₅ or C₅ to C₁₀ cycloalkylgroups, C₆ to C₁₅ or C₆ to C₁₀ aryl groups, or C₇ to C₁₅ or C₇ to C₁₀aralkyl groups. The ester which can be utilized as the neutral non-ionicorganic modifier can be a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbyl,C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ alkyl, C₅ to C₁₅ or C₅ to C₁₀cycloalkyl, C₆ to C₁₅ or C₆ to C₁₀ aryl, or C₇ to C₁₅ or C₇ to C₁₀aralkyl ester of a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbyl, C₁ toC₁₅, C₁ to C₁₀, or C₁ to C₅ alkyl, C₆ to C₁₅ or C₆ to C₁₀ aryl, or C₇ toC₁₅ or C₇ to C₁₀ aralkyl carboxylic acid. In non-limiting aspects, theester which can be utilized as the neutral non-ionic organic modifiercan comprise, consist essentially of, or can be, a methyl, ethyl,propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl,dodecyl, tridecyl, phenyl, toluyl, xylyl, or benzyl acetate, propionate,butanoate, pentanoate, hexanoate, heptanoate, octanoate, nonanoate,decanoate, benzoate, methyl benzoate, dimethyl benzoate, or naphtanoate;alternatively, a methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl,octyl, nonyl, decyl, undecyl, dodecyl, or tridecyl, acetate, propionate,butanoate, pentanoate, hexanoate, heptanoate, octanoate, nonanoate,decanoate; alternatively, a phenyl, toluyl, xylyl, or benzyl acetate,propionate, butanoate, pentanoate, hexanoate, heptanoate, octanoate,nonanoate, or decanoate; or alternatively, a methyl, ethyl, propyl,butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, ortridecyl benzoate, methyl benzoate, dimethyl benzoate, or naphtanoate.In some aspects, the ester which can be utilized as the neutralnon-ionic organic modifier can be a C₄ to C₂₀, C₄ to C₁₅, or C₄ to C₁₀cyclic ester; alternatively, butyrolactone, valerolactone, phthalide, orany combination thereof, alternatively, butyrolactone; alternatively,valerolactone; or alternatively, phthalide.

The aldehyde which can be utilized as the neutral non-ionic organicmodifier can be a C₂ to C₂₀, C₂ to C₁₅, or C₇ to C₁₀ aldehyde. Theketone which can be utilized as the neutral non-ionic organic modifiercan be a C₃ to C₂₀, C₃ to C₁₅, or C₃ to C₁₀ ketone. The aldehyde canhave structure R¹⁵(C═O)H. The ketone can have structure R¹⁵(C═O)R¹⁶. R¹⁵of the aldehyde, R¹⁵ and R¹⁶ and le of the ketone independently can beC₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbyl groups, C₁ to C₁₅, C₁ toC₁₀, or C₁ to C₅ alkyl groups, C₅ to C₁₅ or C₅ to C₁₀ cycloalkyl groups,C₆ to C₁₅ or C₆ to C₁₀ aryl groups, or C₇ to C₁₅ or C₇ to C₁₀ aralkylgroups. In a non-limiting aspect, the aldehyde which can be utilized asthe neutral non-ionic organic modifier can comprise, consist essentiallyof, formaldehyde, acetaldehyde, propionaldehyde, a butyraldehyde,benzaldehyde, a tolualdehyde, a xylylaldehyde, a furaldehyde, or anycombination thereof, alternatively, formaldehyde, acetaldehyde,propionaldehyde, a butyraldehyde, or any combination thereof;alternatively, benzaldehyde, a tolualdehyde, a xylylaldehyde, or anycombination thereof; alternatively, formaldehyde; alternatively,acetaldehyde; alternatively, propionaldehyde; alternatively, abutyraldehyde; alternatively, benzaldehyde; alternatively, atolualdehyde; alternatively, a xylylaldehyde; alternatively, afuraldehyde. The ketone which can be utilized as the neutral non-ionicorganic modifier can comprise, consist essentially of, or can bepropanone, butanone, a pentanone, a hexanone, a heptanone, a octanone, anonanone, a decanone, phenylethanone, phenylpropanone, benzophenone, orany combination thereof^(.), alternatively, propanone, butanone, apentanone, a hexanone, a heptanone, a octanone, a nonanone, a decanone,or any combination thereof, alternatively, phenylethanone,phenylpropanone, benzophenone, or any combination thereof;alternatively, propanone; alternatively, butanone; alternatively, apentanone; alternatively, a hexanone; alternatively, a heptanone;alternatively, a octanone; alternatively, a nonanone; alternatively, adecanone; alternatively, phenylethanone; alternatively, phenylpropanone;or alternatively, benzophenone.

The acid halides which can be utilized as the neutral non-ionic organicmodifier can be a C₂ to C₂₀, C₂ to C₁₅, or C₂ to Cuacid halide. Theanhydride, which can be utilized as the neutral non-ionic organicmodifier can be a C₂ to C₂₀, C₂ to C₁₅, or C₂ to C₁₀ anhydride. The acidhalide can have the structure R¹⁷(C═O)X¹⁰. The anhydride can have thestructure R¹⁷(C═O)O(C═O)R¹⁷. X¹⁰ of the acid halide can be chloride,bromide, or iodide; alternatively, chloride; alternatively, bromide; oralternatively, iodide. Each R¹⁷ of the acid halide and anhydridesindependently can be a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbylgroup, a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ alkyl group, a C₅ to C₁₅ orC₅ to C₁₀ cycloalkyl group, a C₆ to C₁₅ or C₆ to C₁₀ aryl group, or a C₇to C₁₅ or C₇ to C₁₀ aralkyl group. In a non-limiting aspect, the acidhalide which can be utilized as the neutral non-ionic organic modifiercan comprise, consist essentially of, or can be acetyl chloride, acetylbromide, propionyl chloride, propionyl bromide, a butyryl chloride, avaleroyl chloride, hexanoyl chloride, benzoyl chloride, benzoyl bromide,a methylbenzoyl chloride, a dimethyl benzoyl chloride, or anycombination thereof; alternatively, acetyl chloride, acetyl bromide,propionyl chloride, propionyl bromide, a butyryl chloride, a valeroylchloride, hexanoyl chloride, or any combination thereof, alternatively,benzoyl chloride, benzoyl bromide, a methylbenzoyl chloride, a dimethylbenzoyl chloride, or any combination thereof; alternatively, acetylchloride; alternatively, acetyl bromide; alternatively, propionylchloride; alternatively, propionyl bromide; alternatively, a butyrylchloride; alternatively, a valeroyl chloride; alternatively, hexanoylchloride; alternatively, benzoyl chloride; alternatively, benzoylbromide; alternatively, a methylbenzoyl chloride; or alternatively, adimethyl benzoyl chloride.

In a non-limiting aspect, the anhydride which can be utilized as theneutral non-ionic organic modifier can be ethanoic anhydride, propanoicanhydride, a butanoic anhydride, a hexanoic anhydride, maleic anhydride,succinic anhydride, glutaric anhydride, benzoic anhydride, amethylbenzoic anhydride, a dimethyl benzoic anhydride, phthalicanhydride, homophthalic anhydride, or any combination thereof,alternatively, ethanoic anhydride, propanoic anhydride, a butanoicanhydride, a hexanoic anhydride; alternatively, maleic anhydride,succinic anhydride, glutaric anhydride, or any combination thereof,alternatively, benzoic anhydride, a methylbenzoic anhydride, a dimethylbenzoic anhydride, or any combination thereof; alternatively, phthalicanhydride, homophthalic anhydride, or any combination thereof,alternatively, ethanoic anhydride; alternatively, propanoic anhydride;alternatively, a butanoic anhydride; alternatively, a hexanoicanhydride; alternatively, maleic anhydride; alternatively, succinicanhydride; alternatively, glutaric anhydride; alternatively, benzoicanhydride; alternatively, a methylhenzoic anhydride; alternatively, adimethyl benzoic anhydride; alternatively, phthalic anhydride; oralternatively, hornophthalic anhydride.

The nitrile which can be utilized as the neutral non-ionic organicmodifier can be a C₂ to C₂₀, C₂ to C₁₅, or C₂ to C₁₀ nitrile. Thenitrile can have the structure R¹⁸CN. R¹⁸ of the nitrile can be a C₁ toC₁₅, C₁ to C₁₀ , or C₁ to C₅ hydrocarbyl group, a C₁ to C₁₅, C₁ to C₁₀,or C₁ to C₅ alkyl group, a C₅ to C₁₅ or C₅ to C₁₀ cycloalkyl group, a C₆to C₁₅ or C₆ to C₁₀ aryl group, or a C₇ to C₁₅ or C₇ to C₁₀ aralkylgroup. In a non-limiting aspect, the nitrile which can be utilized asthe neutral non-ionic organic modifier can comprise, consist essentiallyof, or can be acetonitrile, propionitrile, a butyronitrile,benzonitrile, or any combination thereof; alternatively, acetonitrile;alternatively, propionitrile; alternatively, a butyronitrile; oralternatively, benzonitrile.

The phosphine which can be utilized as the neutral non-ionic organicmodifier can be a C₃ to C₂₀, C₃ to C₁₅, or C₃ to C₁₀, phosphine. Thephosphine can have the structure (R¹⁹)₃P. The amine can have thestructure (R¹⁹)₃N. Each R¹⁹ of the phosphine independently can be a C₁to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbyl group, a C₁ to C₁₅, C₁ toC₁₀, or C₁ to C₅ alkyl group, a C₅ to C₁₅ or Cs to C₁₀ cycloalkyl group,a C₆ to C₁₅ or C₆ to C₁₀ aryl group, or a C₇ to C₁₅ or C₇ to C₁₀ aralkylgroup. In a non-limiting aspect, the phosphine which can be utilized asthe neutral non-ionic organic modifier can comprise, consist essentiallyof, or can be, trimethylphosphine, triethylphosphine, a tripropylphosphine, a tributylphosphine a trihexyl phosphine, atrioctylphosphine, tricyclopentylphosphine, tricyclohexylphosphine,triphenylphosphine, or any combination thereof; alternatively,trimethylphosphine, triethylphosphine, a tributylphosphine, a trihexylphosphine, a trioctylphosphine, or any combination thereof;alternatively, tricyclopentylphosphine, tricyclohexylphosphine, or anycombination thereof; alternatively, triethylphosphine; alternatively, atributylphosphine; alternatively, a trihexyl phosphine; alternatively, atrioctylphosphine; alternatively, tricyclopentylphosphine;alternatively, tricyclohexylphosphine; or alternatively,triphenylphosphine.

The amine which can be utilized as the neutral non-ionic organicmodifier can be a C₁ to C₂₀, C₁ to C₁₅, or C₁ to C₁₀ amine. The aminecan have the structure H₂NR²⁰, HN(R²⁰)₂, N(R²⁰)₃, or any combinationthereof; alternatively, H₂NR²⁰; alternatively, HN(R²⁰)₂; oralternatively, HN(R²⁰)₃. Each R²⁰ of the amine having structure H₂NR²⁰,HN(R²⁰)₂, or N(R²⁰)₃ independently can be a C₁ to C₁₅, C₁ to C₁₀, or C₁to C₅ hydrocarbyl group, a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ alkylgroup, a C₅ to C₁₅ or C₅ to C₁₀ cycloalkyl group, a C₆ to C₁₅ or C₆ toC₁₀ aryl group, or a C₇ to C₁₅ or C₇ to C₁₀ aralkyl group. In anon-limiting aspect, the amine which can he utilized as the neutralnon-ionic organic modifier can comprise, consist essentially of, or canbe methylamine, ethylamine, a propylamine, a butylamine, a pentylamine,a hexylamine, a heptylamine, an octylatnine, a decylatnine,cyclopentylamine, cyclohexylamine, a piperidine, a inethylpiperidine, adimethylpiperidine, a trimethylpiperidine, a tetramethylpiperidine,aniline, benzylamine, a naphthylamine, dimethylamine, diethylamine, adibutylamine, diphenylamine, methylphenylamine, trimethyl amine,triethyl amine, a tributyl amine, triphenyl amine, pyridine, a picoline,or any combination thereof; alternatively, methylamine, ethylamine, apropylatnine, a butylamine, a pentylamine, a hexylamine, a heptylamine,an octylamine, a decylamine, cyclopentylamine, cyclohexylamine, aniline,benzylamine, a naphthylamine, dimethylamine, diethylamine, adibutylamine, diphenylamine, methylphenylamine, or any combinationthereof; alternatively, methylamine, ethylamine, a propylatnine, abutylamine, a pentylamine, a hexylamine, a heptylamine, an octylamine, adecylamine, cyclopentylamine, cyclohexylamine, aniline, benzylamine, anaphthylamine, or any combination thereof; alternatively, dimethylamine,diethylamine, a dibutylamine, diphenylamine, methylphenylamine, or anycombination thereof; alternatively, piperidine, a methylpiperidine, adimethylpiperidine, a trimethylpiperidine, a tetramethylpiperidine, orany combination thereof; alternatively, trimethyl amine, triethyl amine,a tributyl amine, triphenyl amine, or any combination thereof;alternatively, pyridine, a picoline, or any combination thereof;alternatively, aniline, naphthyl amine, or any combination thereof;alternatively, dimethyl amine, diethyl amine, dibuO amine, diphenylamine, methylphenyl amine; or any combination thereof; alternatively,trimethyl amine, triethyl amine, tributyl amine, triphenyl amine, or anycombination thereof; alternatively, methylatnine; alternatively,ethylamine; alternatively, a propylatnine; alternatively, a butylamine;alternatively, a pentylamine; alternatively, a hexylamine;alternatively, a heptylamine; alternatively, an octylamine;alternatively, a decylamine; alternatively, cyclopentylamine;alternatively, cyclohexylamine; alternatively, piperidine;alternatively, a methylpiperidine; alternatively, a dimethylpiperidine;alternatively, a trimethylpiperidine; alternatively, atetramethylpiperidine; alternatively, aniline; alternatively,benzylamine; alternatively, naphthylamine; alternatively, dimethylamine;alternatively, diethylamine; alternatively, dibutylamine; alternatively,diphenylamine; alternatively, methyl phenylamine; alternatively,trimethylamine; alternatively, triethylamine; alternatively,tributylamine; alternatively, triphenylamine; alternatively, pyridine;or alternatively, picoline.

The amide which can be utilized as the neutral non-ionic organicmodifier can be a C₂ to C₂₀, C₂ to C₁₅, or C₂ to C₁₀ amide. The amidecan have the structure H(C═O)NHR²², H(C═O)N(R²²)₂, R²¹(C═O)NH₂,R²¹(C═O)NHR²², R(C═O)N(R²²)₂, or any combination thereof; alternatively,H(C═O)NHR²² or H(C═O)N(R²²)₂, or any combination thereof; alternatively,R²¹(C═O)NH₂, R²¹(C═O)NHR²², or R(C═O)N(R²²)₂, or any combinationthereof; alternatively, H(C═O)NHR²²; alternatively, H(C═O)N(R²²)₂;alternatively, R²¹(C═O)NH₂; alternatively, R²¹(C═O)NHR²²; oralternatively, R(C═O)N(R²²)₂. R²¹ and each R²² of the amideindependently can be a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbylgroup, a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ alkyl group, a C₅ to C₁₅ orC₅ to C₁₀ cycloalkyl group, a C₆ to C₁₅ or C₆ to C₁₀ aryl group, or a C₇to C₁₅ or C₇ to C₁₀ aralkyl group. In a non-limiting aspect, the amidewhich can be utilized as the neutral non-ionic organic modifier cancomprise, consist essentially of, or can be, N-methylformamide,N,N-dimethylformamide, N-ethylformamide, N,N-diethylformamide, anN-propylfornmmide, an N,N-dipropylformamide, an N-butylformamide, aN,N-dibutylformamide, N-phenylformamide, N,N-diphenylformamide,acetamide, N-methylacetamide, N,N-dimethylacetamide, N-ethylacetamide,N,N-diethylacetamide, a N-propylacetamide, an N,N-dipropylacetamide, anN-butylacetamide, an N,N-dibutylacetamide, N-phenylacetamide,N,N-diphenylacetamide, an N-(methylphenyl)acetamide,N,N-(dimethylphenypacetamide, propionamide, N-methylpropionamide,N,N-dimethylpropionamide, N-ethylpropionamide, N,N-diethylpropionamide,N-phenylpropionamide, N,N-diphenylpropiona.mide, a butyramide, anN-methylbutyramide, N,N-dimethylbutyramide, N-ethylbutyramide,N,N-diethylbutyramide, N-phenylbutyramide, N,N-diphenylbutyramide,benzamide, N-methylbenzamide, N,N-dimethylbenzamide, N-ethylbenzamide,N,N-diethylbenzatnide, N-phenylbenzamide, N,N-diphenylbenzamide, amethylbenzamide, an N-methyl-methylbenzamide,N,N-dimethyl-methylbenzamide, N-ethyl-methylbenzamide methylbenzamide,N-phenyl-methylbenzamide N,N-diphenyl-methylbenzamide or any combinationthereof; alternatively, N-methylformamide, N,N-dimethylformamide,N-methylacetamide, N,N-dimethylacetamide, N-ethylacetamide,N,N-diethylacetamide, N-phenylacetamide, N,N-diphenylacetatnide,N-methylpropionamide, N,N-dimethylpropionamide, N-methylbenzamide,N,N-dimethylbenzamide, or any combination thereof; alternatively,N-methylformamide; alternatively, N,N-dimethylformamide; alternatively,N-methylacetamide; alternatively, N,N-dimethylacetamide; alternatively,N-ethyl acetainide ; alternatively, N,N-diethylacetamide; alternatively,N-phenylacetamide; alternatively, N,N-diphenylacetatnide; alternatively,N-methylpropionamide; alternatively, N,N-dimethylpropionamide;alternatively, N-methylbenzamide; or alternatively,N,N-dimethylbenzamide.

The alcohol which can be utilized as the neutral non-ionic organicmodifier can be a C₂ to C₂₀, C₂ to C₁₅, or C₂ to C₁₀ alcohol. Thenitrile can have the structure R²³CH₂OH. R²³ of the alcohol nitrile canbe a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbyl group, a C₁ to C₁₅,C₁ to C₁₀, or C₁ to C₅ alkyl group, a C₅ to C₁₅ or C₅ to C₁₀ cycloalkylgroup, a C₆ to C₁₅ or C₆ to C₁₀ aryl group, or a C₇ to C₁₅ or C₇ to C₁₀aralkyl group. In a non-limiting aspect, the alcohol which can beutilized as the neutral non-ionic organic modifier can comprise, consistessentially of, or can be, methanol, ethanol, a propanol, a butanol, apentanol, a hexanol, a heptanol, an octanol, a nonanol, an decanol,phenol, a methylphenol, a dimethylphenol, an ethylphenol, apropylphenol, a dibutylphenol, or any combination thereof;alternatively, methanol, ethanol, a propanol, a butanol, a pentanol, orany combination thereof; alternatively, a methylphenol, adimethylphenol, an ethylphenol, a propylphenol, a dibutylphenol, or anycombination thereof; alternatively, methanol; alternatively, ethanol;alternatively, a propanol; alternatively, a butanol; alternatively, apentanol; alternatively, methylphenol; alternatively, a dimethylphenol;alternatively, an ethylphenol; alternatively, a propylphenol; oralternatively, a dibutylphenol.

Generally, when a neutral non-ionic organic modifier is utilized, theneutral non-ionic organic modifier can be utilized in relation to thezirconium compound and/or the hydrocarbylmetal (or hydrocarbylaluminum)compound. The neutral non-ionic organic modifier to zirconium of thezirconium compound molar ratio (also referred to herein as modifier:Zrmolar ratio) and/or neutral non-ionic organic modifier tohydrocarbylmetal (or hydrocarbylaluminum) compound molar ratio (alsoreferred to herein as modifier:M (or modifier:Al) molar ratio), can beany ratio, which can form an oligomer product when the catalyst systemis contacted with ethylene. When the neutral non-ionic organic modifieris utilized in relation to the zirconium of the zirconium compound, theminimum modifier:Zr molar ratio can be 0.1:1, 0.5:1, 0.75:1 0.8:1,0.9:1, or 1:1; additionally or alternatively, the maximum modifier:Zrmolar ratio can be 20:1, 15:1, 10:1 7.5:1, or 5:1. Generally, themodifier:Zr molar ratio can range from any minimum modifier:Zr molarratio described herein to any maximum modifier:Zr molar ratio describedherein. Accordingly, suitable non-limiting modifier:Zr molar ratios canbe in a range from 0.5:1 20:1, 0.5:1 to 15:1, 0.75: 10:1, 1:1 to 15:1,1:1 to 10:1, 1:1 to 5:1, 0.5:1 to 5:1, 0.75:1 to 3:1, 0.8:1 to 2:1,0.9:1 or 1.25. Other appropriate modifier:Zr molar ratio ranges arereadily apparent from this disclosure. When the neutral non-ionicorganic modifier is utilized in relation to the hydrocarbylmetal (orhydrocarbylaluminum) compound, the minimum modifier:M (or modifier:Al)molar ratio can be 0.05:1, 0.1:1, 0.5:1, 0.75:1 0.8:1, 0.9:1, or 1:1;additionally or alternatively, the maximum modifier:Zr molar ratio canbe 5:1, 3:1, 2:1, 1.5:1, 1:1, 0.75:1, or 0.5:1. Generally, the minimummodifier:M (or modifier:Al) molar ratio can range from any minimummodifier:M (or modifier:Al) molar ratio described herein to any maximumminimum modifier:M (or modifier:Al) molar ratio described herein.Accordingly, suitable non-limiting minimum modifier:M (or modifier:Al)molar ratio can be in a range from 0.5:1 to 5:1, 0.5:1 to 3:1, 0.75:1 to2:1, or 0.75:1 to 1.5:1. Other appropriate modifier:M (or modifier:Al)molar ratio ranges are readily apparent from this disclosure.

In an aspect, the catalyst system can be prepared and then either i)contacted with ethylene, the chain transfer agent, and optional organicreaction medium or ii) introduced into the reaction zone. For example,in an aspect the process can comprise contacting the zirconium compoundand the hydrocarbylmetal (or hydrocarbyl aluminum) compound to form thecatalyst system which is then i) contacted with the ethylene, the chaintransfer agent, and optional organic reaction medium, or ii) introducedinto the reaction zone. When a neutral non-ionic organic modifier isutilized in the catalyst system, the neutral non-ionic organic modifiercan be contacted with the zirconium compound prior to contacting thehydrocarbylmetal (or hydrocarbylaluminum) compound, can be contactedwith the hydrocarbylmetal (or hydrocarbylaluminum) compound prior tocontacting the zirconium compound, or can be contacted with a mixture ofthe zirconium compound and the hydrocarbylmetal (or hydrocarbylaluminum)compound. In another aspect, the neutral non-ionic organic modifier, thezirconium compound, and the hydrocarbylmetal (or hydrocarbylalumintcompound can be simultaneously contacted to form the catalyst system.

In an alternative aspect, the catalyst system can be prepared in-situwhere two or more components of the catalyst system are either i)separately (and/or simultaneously) contacted with ethylene, the chaintransfer agent, and optional organic reaction medium or ii) separately(and/or simultaneously) introduced into the reaction zone. For example,in an aspect the process can comprise i) separately (and/orsimultaneously) contacting the zirconium compound and the hydrocarbylcompound with the ethylene, the chain transfer agent, and optionalorganic reaction medium, or ii) separately (and/or simultaneously)introducing the zirconium compound and the hydrocarbyl compound into thereaction zone. In an aspect when a neutral non-ionic organic modifier isutilized in the catalyst system, the neutral non-ionic organic modifiercan be contacted with the zirconium compound (to form a zirconiumcompound/neutral non-ionic organic modifier mixture) prior to separately(and/or simultaneously) contacting the zirconium compound (or thezirconium compound/neutral non-ionic organic modifier mixture) and thehydrocarbylmetal (or hydrocarbylaluminum) compound with ethylene, thechain transfer agent, and optional organic reaction medium or separately(and/or simultaneously) introducing the zirconium compound (or thezirconium compound/neutral non-ionic organic modifier mixture) and thehydrocarbylmetal (or hydrocarbylaluminum) compound into the reactionzone. In another aspect when a neutral non-ionic organic modifier isutilized in the catalyst system, the neutral non-ionic organic modifiercan be contacted with the hydrocarbylmetal (or hydrocarbylaluminum)compound (to form a hydrocarbylmetal (or hydrocarbylaluminum)compound/neutral non-ionic organic modifier mixture) prior to separately(and/or simultaneously) contacting the hydrocarbylmetal (orhydrocarbylaluminum) compound or the hydrocarbylmetal (orhydrocarbylaluminum) compound/neutral non-ionic organic modifiermixture) and the zirconium compound with ethylene, the chain transferagent, and optional organic reaction medium or separately (and/orsimultaneously) introducing the hydrocarbylmetal (orhydrocarbylaluminum) compound (or hydrocarbylmetal (orhydrocarbylaluminum) compound/neutral non-ionic organic modifiermixture) and the zirconium compound into the reaction zone. In a furtheraspect when a neutral non-ionic organic modifier is utilized in thecatalyst system, the neutral non-ionic organic modifier, the zirconiumcompound, and the hydrocarbylmetal (or hydrocarbylaluminum) compound canbe separately (and/or simultaneously) contacted with ethylene, the chaintransfer agent, and optional organic reaction medium or separately(and/or simultaneously) introduced into the reaction zone.

In one non-limiting aspect, the catalyst system can comprise a zirconiumcompound having the formula ZrX¹ _(m), and a hydrocarbylmetal compoundcomprise a hydrocarbylmetal compound having the formula AlX² _(n)R¹_(3−n), Al₂X² ₃R¹ ₃, R¹ ₂Zn) or any combination thereof. X¹, X², m, andn are independently described herein and these independent descriptionscan be utilized without limitation and in any combination to furtherdescribe the catalyst system that can comprise a zirconium compoundhaving the formula ZrX¹ _(m) and a hydrocarbylmetal compound comprisingan alkylaluminum compound having the formula AlX² _(n)R¹ _(3−n), Al₂X²₃R¹ ₃, a dialkyl zinc compound (R¹ ₂Zn). In an aspect, each X¹ of ZrX¹_(m) independently can be chloride or bromide and m is 4. In an aspect,the zirconium compound having the formula ZrX¹ _(m) can comprise,consist essentially of, or can be, ZrCl₄, ZrBr₄, ZrClBr₃, ZrCl₂Br₂ andZrCl₃Br; alternatively, ZrCl₄ or ZrBr₄; or alternatively, ZrClBr₃; oralternatively, ZrCl₄. In an aspect, the hydrocarbylmetal compound cancomprise an hydrocarbylmetal compound having the formula AlX² ₂R¹,AlX²R¹ ₂, AlR¹ ₃, Al₂X² ₃R¹ ₃, R¹ ₂Zn, or any combination thereof;alternatively, AlX² ₂R¹, AlX²R¹ ₂, AlR¹ ₃, Al₂X² ₃R¹ ₃, or anycombination thereof. X² and R ¹ are independently described herein andthese independent descriptions can be utilized without limitation and inany combination to further describe the catalyst system that cancomprise a zirconium compound having the formula ZrX¹ _(m) and ahydrocarbylmetal compound comprising an alkylaluminum compound havingthe formula AlX² _(n)R¹ _(3−n), Al₂X² ₃R¹ ₃, R¹ ₂Zn, or any combinationthereof. In an aspect, each X² of the hydrocarbylmetal compoundindependently can be a halide and each R¹ independently can be a C₂ toC₄ alkyl group. In some aspects, the alkylmetal compound can comprise,or consist essentially of, triethylaluminum, diethylaluminum chloride,ethylaluminum dichloride, ethylaluminwn sesquichloride, diethylzinc, orany combination thereof; alternatively, triethylaluminum anddiethylaluminum chloride; alternatively, triethylaluminum andethylaluminum dichloride; alternatively, triethylaluminum andethylaluminum sesquichloride; alternatively, diethylaluminum chlorideand ethylaluminum dichloride; alternatively, ethylaluminumsesquichloride. Non-limiting values for the metal of thehydrocarbylmetal (or aluminum of the hydrocarbylaluminum) compound tozirconium of the zirconium compound molar ratio can be in a range offrom 1:1 to 50:1, 1:1 to 15:1, or 10:1 to 25:1. In some non-limitingaspects, the catalyst system (or catalyst system components) can furthercomprise a neutral non-ionic organic modifier comprising C₂ to C₂₀ ester(any described herein) where the neutral non-ionic organic modifier tozirconium of the zirconium compound molar ratio can be in any rangedisclosed herein (e.g., in a range of 0.5:1 to 5:1). in othernon-limiting aspects, the catalyst system (or catalyst systemcomponents) can further comprise a neutral non-ionic organic modifiercomprising a C₂ to C₂₀ ether, C₂ to C₂₀ sulfide, a C₁ to C₂₀ amine, a C₃to C₂₀ phosphine, or any combination thereof (alternatively, a C₂ to C₂₀ether, C₂ to C₂₀ sulfide, or any combination thereof; alternatively, aC₂ to C₂₀ ether; alternatively, a C₂ to C₂₀ sulfide; alternatively, a C₁to C₂₀ amine; or alternatively, a C₃ to C₂₀ phosphine) wherein theneutral non-ionic organic modifier to zirconium of the zirconiumcompound molar ratio can be any range disclosed herein (e.g., in a rangeof from 0.5:1 to 20:1)

In another non-limiting aspect, the zirconium compound can have theformula ZrX¹ _(m)Y¹ _(q) and the hydrocarbylmetal compound can comprisea hydrocarbylmetal compound having the formula AlX² _(n)R¹ _(3−n), Al₂X²₃R¹ ₃, or any combination thereof X¹, Y¹, X², R¹, n, and q areindependently described herein and these independent descriptions can beutilized without limitation and in any combination to further describethe catalyst system that can comprise a zirconium compound having theformula ZrX¹ _(m)Y¹ _(q) and a hydrocarbylmetal compound comprising analkylaluminum compound having the formula AlX² _(n)R¹ _(3−n), Al₂X² ₃R¹₃, or any combination thereof. Each X¹ of ZrX¹ _(m)Y¹ _(q) independentlycan be chloride or bromide; alternatively, chloride. Each Y¹ of ZrX¹_(m)Y¹ _(q) independently can be a C₁ to C₁₀ hydrocarboxide (e.g., anydescribed herein), a C₁ to C₁₀ hydrocarbylcarboxylate (e.g., anydescribed herein), or a C₁ to C₁₅ hydrocarbylsulfonate (e.g., anydescribed herein); alternatively, a C₁ to C₁₀ hydrocarboxide (e.g., anydescribed herein); alternatively, a C₁ to C₁₀ hydrocarbylcarboxylate(e.g., any described herein); or alternatively, a C₁ to C₁₅hydrocarbylsulfonate (e.g., any described herein). For ZrX¹ _(m)Y¹ _(q),m can be in a range from 0 to 4, q can be in a range from 0 to 4, andm+q can be 4; alternatively, m can be 4 and q can be 0; oralternatively, m can be 0 and q can be 4. In an aspect the zirconiumcompound having the formula ZrX¹ _(m)Y¹ _(q) can comprise, can consistessentially of, or can be, a zirconium tetra C₁ to C₁₀hydrocarbylcarboxylate; alternatively, a zirconium tetra C₁ to C₅hydrocarbylcarboxylate; or alternatively, Zr(O₂C₃H₇)₄. In anotheraspect, the zirconium compound having the formula ZrX¹ _(m) cancomprise, consist essentially of, or can be, ZrCl₄, ZrBr₄, ZrClBr₃,ZrCl₂Br₂ and ZrCl₃Br; alternatively, ZrCl₄ or ZrBr₄; or alternatively,ZrClBr₃; or alternatively ZrCl₄. In an aspect, hydrocarbylmetal compoundcan comprise an hydrocarbylmetal compound having the formula. AlX² ₂R¹,AlX²R¹ ₂, AlR¹ ₃, Al₂X² ₃R¹ ₃, or any combination thereof;alternatively, AlX² ₂R¹, AlX²R¹ ₂, AlR¹ ₃, Al₂X² ₃R¹ ₃, or anycombination thereof X² and R¹ are independently described herein andthese independent descriptions can be utilized without limitation and inany combination to further describe the catalyst system that cancomprise a zirconium compound having the formula ZrX¹ _(m) and ahydrocarbylmetal compound comprising an alkylaluminum compound havingthe formula AlX² _(n)R¹ _(3−n), Al₂X² ₃R¹ ₃, R¹ ₂Zn, or any combinationthereof. In an aspect, each X² of the hydrocarbylmetal compoundindependently can be a halide and each R¹ independently can be a C₂ toC₄ alkyl group. In some aspects, the alkylmetal compound can comprise,or consist essentially of; triethylaluminum, diethylaluminum chloride,ethylaluminum dichloride, ethylaluminum sesquichloride, or anycombination thereof; alternatively, triethylaluminum and diethylaluminumchloride; alternatively, triethylaluminum and ethylaluminum dichloride;alternatively, triethylaluminum and ethylaluminum sesquichloride;alternatively, diethylaluminum chloride and ethylaluminum dichloride;alternatively, ethylaluminum sesquichloride. Non-limiting values for themetal of the hydrocarbylmetal (or aluminum of the hydrocarbylaluminum)compound to zirconium of the zirconium compound molar ratio can be in arange of from 1:1 to 50:1, 2:1 to 25:1, or 1:1 to 15:1, among othersdisclosed herein. In an aspect, the zirconium compound having theformula ZrX¹ _(m)Y ¹ _(q) can be at partially hydrolyzed by contactingZrX¹ _(m)Y¹ _(q) with water at a water to zirconium molar ratio of0.01:1 to 3:1, 0.1: to 2:1, or 0.25:1 to 1.75:1. In an aspect, thecatalyst system (or catalyst system components) can further comprise aneutral non-ionic organic modifier comprising a C₂ to C₁₅ alcohol, C₁ toC₁₅ amine, C₂ to C₁₅ amide, or any combination thereof; alternatively,C₂ to C₁₅ alcohol; alternatively, C₁ to C₁₅ amine; or alternatively, C₂to C₁₅ amide. In an aspect, the neutral non-ionic organic modifier tometal of the hydrocarbylmetal (or aluminum of the hydrocarbylaluminum)compound molar ratio is in a range of 0.75:1 to 2:1, or 0.75:1 to 1.5:1,among others disclosed herein. In an aspect, neutral non-ionic organicmodifier can be contacted with the hydrocarbylmetal (orhydrocarbylaluminum) compound prior to the hydrocarbylmetal (orhydrocarbylaluminum) compound contacting the zirconium compound and/orethylene (and/or being introduced into the reaction zone). In someaspects, the neutral non-ionic organic modifier is contacted with thezirconium compound prior to the zirconium compound contacting ethyleneand/or the hydrocarbylmetal compound (and/or being introduced into thereaction zone).

The process described herein can utilize 1) a chain transfer agentcomprising a compound having a hydrogen silicon bond, a compound havinga hydrogen sulfur bond, a compound having a hydrogen phosphorus bond, orany combination thereof, 2) hydrogen, 3) a transition metal compoundchain transfer agent, or any combination thereof; alternatively, 1) achain transfer agent comprising a compound having a hydrogen siliconbond, a compound having a hydrogen sulfur bond, a compound having ahydrogen phosphorus bond, and 2) hydrogen; alternatively, a chaintransfer agent comprising a compound having a hydrogen silicon bond, acompound having a hydrogen sulfur bond, a compound having a hydrogenphosphorus bond, or any combination thereof; alternatively, hydrogen; oralternatively, a transition metal compound chain transfer agent.Generally, the chain transfer agent, hydrogen, and/or the transitionmetal compound chain transfer agent are utilized to achieve a desirableeffect in the process of forming an oligomer product. The desirableeffect can include the production of (a) less than 1 wt. % of polymer,(b) less than 1 wt.% compounds having a weight average molecular weightof greater than 1000 g/mol, or (c) any combination thereof wherein thewt. % is based on the total weight of the oligomer product;alternatively or additionally, producing an oligomer product (a)comprising a polymer having a lower Mw, (b) an oligomer product wherethe polymer has a lower Mw maximum peak, (c) an oligomer product havinga reduced quantity of polymer, (d) an oligomer product having a reduced% of polymer having a molecular weight greater than 100,000 molecularweight, or (e) any combination thereof relative to the same process notusing a 1) a chain transfer agent comprising a compound having ahydrogen silicon bond, a compound having a hydrogen sulfur bond, acompound having a hydrogen phosphorus bond, or any combination thereof,2) hydrogen, and/or 3) a transition metal compound chain transfer agent.

The chain transfer agent can comprise, consist essentially of, or canbe, a compound having a hydrogen silicon bond, a compound having ahydrogen sulfur bond, a compound having a hydrogen phosphorus bond, orany combination thereof; alternatively, a compound having a hydrogensilicon bond; alternatively, a compound having a hydrogen sulfur bond;or alternatively, a compound having a hydrogen phosphorus bond. Thereaction zone can have any chain transfer agent to ethylene mole ratiowhich can provide any desired effect described herein. In an aspect, thereaction zone can have a minimum chain transfer agent to ethylene moleratio of 1×10⁻⁵:1, 5×10⁻⁴:1, 1×10⁻⁴:1, or 5×10 ⁻³:1; additionally oralternatively, a maximum chain transfer agent to ethylene mole ratio of5×10 ⁻¹:1, 1×10⁻¹:1, 5×10⁻²:1, or 1×10⁻²:1. Generally, the reaction zonecan have chain transfer agent to ethylene mole ratio that can range fromany minimum chain transfer agent to ethylene mole ratio described hereinto any maximum chain transfer agent to ethylene mole ratio describedherein. Accordingly, suitable reaction zone chain transfer agent toethylene mole ratios can be in a range from 1×10⁻⁵:1 to 5×10⁻¹:1,5×10⁻⁴:1 to 1×10⁻¹:1, 1×10⁻⁴:1 to 5×10 ⁻²:1, or 5×10 ⁻³:1 to 1×10⁻²: 1.Other appropriate reaction zone chain transfer agent to ethylene moleratio ranges are readily apparent from this disclosure.

The compound having a hydrogen silicon bond which can be utilized as theneutral non-ionic organic modifier can be a C₁ to C₄₀, C₁ to C₃₀, or C₁to C₂₀ compound having a hydrogen silicon bond. In an aspect, thecompound having a hydrogen silicon bond which can be utilized as a chaintransfer agent can have the formula R³¹SiH₃, (R³¹)₂SiH₂, (R³¹)₃SiH,R³¹OSiH3, (R³¹O)₂SiH₂, (R³¹O)₃SiH, or any combination thereof;alternatively, R³¹SiH₃, (R³¹)₂SiH₂, (R³¹)₃SiH, or any combinationthereof; alternatively, R³¹OSiH3, (R³¹O)₂SiH₂, (R³¹O)₃SiH, or anycombination thereof; alternatively, R³¹SiH₃; alternatively, (R³¹)₂SiH₂;alternatively, (R³¹)₃SiH; alternatively, R³¹OSiH3; alternatively,(R³¹O)₂SiH₂; or alternatively, (R³¹O)₃SiH. Each R³¹ of the formulas ofthe compounds having a hydrogen silicon bond independently can be a C₁to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbyl group, a C₁ to C₁₅, C₁ toC₁₀, or C₁ to C₅ alkyl group, a C₅ to C₁₅ or C₅ to C₁₀ cycloalkyl group,a C₆ to C₁₅ or C₆ to C₁₀ aryl group, or a C₇ to C₁₅ or C₇ to C₁₀ aralkylgroup. In a non-limiting aspect, the compound having a hydrogen siliconbond (e.g., having any formula described herein) can comprise, consistessentially of, or can be, trimethylsilane, diethylsilane,triethylsilane, a tripropylsilane, a dibutylsilane, a tributylsilane, ahexylsilane, a dihexylsilane a trihexylsilane, an octylsilane, adioctylsilane, a trioctylsilane, a decylsilane, a didecylsilane, atridecylsilane, a tridodecylsilane, phenylsilane, diphenylsilane,triphenylsilane, phenethylsilane, diphenethylsilane, triphenethylsilane,trimethoxysilane, triethoxysilane,9,10-dimethyl-9,10-dihydro-9,10-disilaanthracene, tetraphenyldisilane,or any combination thereof alternatively, trimethylsilane,diethylsilane, triethylsilane, a tripropylsilane, a dibutylsilane, atributylsilane, a hexylsilane, a dihexylsilane, a trihexylsilane, anoctylsilane, a dioctylsilane, a trioctylsilane, a decylsilane, adidecylsilane, a tridecylsilane, a tridodecylsilane, phenylsilane,diphenylsilane, triphenylsilane, phenethylsilane, diphenethylsilane,triphenethylsilane, or any combination thereof; trimethylsilane,diethylsilane, triethylsilane, a tripropylsilane, a dibutylsilane, atributylsilane, a hexylsilane, a dihexylsilane, a trihexylsilane, anoctylsilane, a dioctylsilane, a decylsilane, a didecylsilane,phenylsilane, diphenylsilane, triphenylsilane, phenethylsilane,diphenethylsilane, or any combination thereof; alternatively, atrioctylsilane, a tridecylsilane, a tridodecylsilane,triphenethylsilane, or any combination thereof; alternatively,trimethoxysilane, triethoxysilane, or any combination thereof oralternatively, phenylsilane, diphenylsilane, or any combination thereof.

The compound having a hydrogen sulfur bond which can be utilized as theneutral non-ionic organic modifier can be a C₁ to C₂₀, C₁ to C₁₅, or C₁to C₁₀ compound having a hydrogen sulfur bond. The compound having ahydrogen sulfur bond which can be utilized as the neutral non-ionicorganic modifier can comprise, consist essentially of, or can be, a C₁to C₂₀, C₁ to C₁₅, or C₁ to C₁₀ thiol, C₁ to C₂₀, C₁ to C₁₅, or C₁ toC₁₀ thioglycolate, and/or a C₁ to C₂₀, C₁ to C₁₅, or C₁ to C₁₀mercaptopropionate; alternatively, C₁ to C₂₀, C₁ to C₁₅, or C₁ to C₁₀thiol; alternatively, C₁ to C₂₀, C₁ to C₁₅, or C₁ to C₁₀ thioglycolate;or alternatively, a C₁ to C₂₀, C₁ to C₁₅, or C₁ to C₁₀mercaptopropionate. In an aspect, the compound having a hydrogen sulfurbond which can be utilized as a chain transfer agent can have theformula R³²SH, R³²CO₂CH₂SH, R³²CO₂CH₂CH₂SH, or any combination thereof;alternatively, R³²CO₂CH₂SH, R³²CO₂CH₂CH₂SH, or any combination thereof;alternatively, R³²SH; alternatively, R³²CO₂CH₂SH; or alternatively,R³²CO₂CH₂CH₂SH. R³² of the formulas of compounds having a hydrogensulfur bond can be a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbylgroup, a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ alkyl group, a C5 to C₁₅ orC₅ to C₁₀ cycloalkyl group, a C₆ to C₁₅ or C₆ to C₁₀ aryl group, or a C₇to C₁₅ or C₇ to C₁₀ aralkyl group. In a non-limiting aspect, thecompound having a hydrogen sulfur bond (e.g., having any formuladescribed herein) can comprise, consist essentially of, or can be,methanethiol, ethanethiol, a propanethiol, a butanethiol, apentanethiol, a hexanethiol, a heptanethiol, an octanethiol, anonanethiol, a decanethiol, a undecanethiol, a dodecanethiol, methylthioglycolate, ethyl thioglycolate, a methyl mercaptopropionate, anethyl mercaptopropionate, or any combination thereof; alternatively,methanethiol, ethanethiol, a propanethiol, a butanethiol, apentanethiol, a hexanethiol, a heptanethiol, an octanethiol, anonanethiol, a decanethiol, a undecanethiol, a dodecanethiol, or anycombination thereof; alternatively, methanethiol, ethanethiol, apropanethiol, a butanethiol, a pentanethiol or any combination thereof;alternatively, a hexanethiol, a heptanethiol, an octanethiol, anonanethiol, a decanethiol, a undecanethiol, a dodecanethiol, or anycombination thereof; alternatively, methyl thioglycolate, ethylthioglycolate, a methyl mercaptopropionate, an ethyl mercaptopropionate,or any combination thereof; alternatively, ethanethiol; alternatively, apropanethiol; alternatively, a butanethiol; alternatively,tert-butylthiol; alternatively, octanethiol; alternatively, adecanethiol; alternatively, a dodecanethiol; alternatively, methylthioglycolate; or alternatively, a methyl mercaptopropionate.

The compound having a hydrogen phosphorus bond which can be utilized asthe neutral non-ionic organic modifier can be a C₁ to C₄₀, C₁ to C₃₀, orC₁ to C₂₀ compound having a hydrogen phosphorus bond. The compoundhaving a hydrogen phosphorus bond which can be utilized as the neutralnon-ionic organic modifier can comprise, consist essentially of, or canbe, a C₁ to C₄₀, C₁ to C₃₀, or C₁ to C₂₀ phosphine and/or C₁ to C₄₀, C₁to C₃₀, or C₁ to C₂₀ phosphite; alternatively, a C₁ to C₄₀, C₁ to C₃₀,or C₁ to C₂₀ phosphine; or alternatively a C₁ to C₄₀, C₁ to C₃₀, or C₁to C₂₀ phosphite. In an aspect, the compound having a hydrogenphosphorus bond which can be utilized as a chain transfer can have theformula (R³³)₂PH, (R³³O)₂P(═O)H, or any combination thereof;alternatively, R³³PH₂; or alternatively, (R³³O)₂P(═O)H. Each R³³ of theformulas of the compounds having a hydrogen phosphorus bondindependently can be a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ hydrocarbylgroup, a C₁ to C₁₅, C₁ to C₁₀, or C₁ to C₅ alkyl group, a C₅ to C₁₅ orC₅ to C₁₀ cycloalkyl group, a C₆ to C₁₅ or C₆ to C₁₀ aryl group, or a C₇to C₁₅ or C₇ to C₁₀ aralkyl group. In a non-limiting aspect, thecompound having a phosphorus hydrogen bond (e.g., having any formuladescribed herein) can comprise, consist essentially of, or can be,dimethylphosphine, diethylphosphine, a dipropylphosphine, adibutylphosphine, a dihexylphosphine, a dioctylphosphine,dicyclopenylphosphine, dicyclohexylphosphine, phenylphosphine, diphenylphosphine, dimethylphosphite, diethylphosphite, a dibutylphosphite, adihexylphosphite, a dioctylphosphite, diphenylphosphite,dibenzylphosphite, or any combination thereof; dimethylphosphine,diethylphosphine, a dibutylphosphine, a dioctylphosphinedicyclopenylphosphine, dicyclohexylphosphine, phenylphosphine, diphenylphosphine, dimethylphosphite, diethylphosphite, diphenylphosphite,dibenzylphosphite, or any combination thereof; alternatively,dimethylphosphine, diethylphosphine, a dibutylphosphine,dicyclopenylphosphine, dicyclohexylphosphine, a dioctylphosphine,phenylphosphine, diphenyl phosphine, or any combination thereof; oralternatively, dimethylphosphite, diethylphosphite, diphenylphosphite,dibenzylphosphite, or any combination thereof.

The transition metal compound chain transfer agent can comprise, consistessentially of, or can be, a group 8 transition metal compound, a group9 transition meal compound, a group 10 transition metal compound, or anycombination thereof; alternatively, a group 8 transition metal compound;alternatively, a group 9 transition meal compound; or alternatively, agroup 10 transition metal compound. In an aspect, the reaction zone canhave a minimum as transition metal to ethylene mole ratio of 1×10⁻⁹: 1,5×10⁻⁸: 1, 1×10⁻⁸: 1, 5×10⁻⁷: 1, or 1×10⁻⁷: 1; additionally oralternatively, a maximum as transition metal to ethylene mole ratio of5×10⁻³:1, 1×10⁻³: 1, 5×10⁻⁴: 1, 1×10⁻⁴: 1, or 5×10⁻⁵:1. Generally, thereaction zone can have as transition metal to ethylene mole ratio thatcan range from any minimum as transition metal to ethylene mole ratiodescribed herein to any maximum as transition metal to ethylene moleratio described herein. Accordingly, suitable reaction zone astransition metal to ethylene mole ratios can be in a range from 1×10⁻⁹:1 to 5×10⁻³:1, 5×10⁻⁸:1 to 1×10⁻³: 1, 1×10⁻⁸: 1 to 5×10⁻⁴:1, 5×10⁻⁷: 1to 1×10⁻⁴:1, or 1×10⁻⁷:1 to 5×10⁻⁵: 1. Other appropriate reaction zoneas transition metal to ethylene mole ratio ranges are readily apparentfrom this disclosure.

Generally, the transition metal compound chain transfer agent can havethe formula MX⁴ _(p) where M is the transition metal, X⁴ is a monoanion, and p is the oxidation state of the transition metal M. Thetransition metal M can be group 8-10 transition metal; alternatively, agroup 8-9 transition metal; alternatively, a group 8 transition metal;alternatively, a group 9 transition metal; or alternatively, a group 10transition metal. In an aspect, the transition metal M can be iron,cobalt, or nickel; alternatively, iron or cobalt; alternatively, iron;alternatively, cobalt; or alternatively, nickel. Generally, p of thetransition metal compound chain transfer agent having the formula MX⁴_(p) is an integer from 2 to 4, is 2 or 3, 2, 3, or 4. In an aspect,each p of the transition metal compound chain transfer agent having theformula MX⁴ _(p) independently can be a halide, a carboxylate, abeta-dionate, an hydrocarboxide, or a nitrate; alternatively, acarboxylate, a beta-dionate, or an hydrocarboxide; alternatively, acarboxylate or a beta-dionate; alternatively, a carboxylate; oralternatively, a beta-dionate. In an aspect, each carboxylate group ofthe transition metal compound chain transfer agent having the formulaMX⁴ _(p) independently can be a C₂ to C₂₄, a C₄ to C₁₉, or a C₅ to C₁₂carboxylate. In an aspect, each hydrocarboxide of the transition metalcompound chain transfer agent having the formula MX⁴ _(p) independentlycan be a C₁ to C_(24, a) C₄ to C₁₉, or a C₅ to C₁₂ hydrocarboxide. In anaspect, each beta-dionate group of the transition metal compound chaintransfer agent having the formula MX⁴ _(p) independently can be a C₅ toC₂₄, a C₅ to C₁₉, or a C₅ to C₁₂ beta-dionate.

Generally, each halide of the transition metal compound chain transferagent having the formula MX⁴ _(p) independently can be chlorine,bromine, or iodine; alternatively, bromine; or alternatively, iodine.Generally, each carboxylate of the transition metal compound chaintransfer agent having the formula MX⁴ _(p) independently can be acetate,a propionate, a butyrate, a pentanoate, a hexanoate, a heptanoate, anoctanoate, a nonanoate, a decanoate, an undecanoate, or a dodecanoate;alternatively, a pentanoate, a hexanoate, a heptanoate, an octanoate, anonanoate, a decanoate, an undecanoate, or a dodecanoate; alternatively,a pentanoate, a hexanoate, a heptanoate, an octanoate, a nonanoate adecanoate, an undecanoate, or a dodecanoate; alternatively, a hexanoate;alternatively, a octanoate; alternatively, a decanoate; or alternativelya dodecanoate. Generally, each hydrocarboxide of the transition metalcompound chain transfer agent having the formula MX⁴ _(p) independentlycan be methoxide, ethoxide, a propoxide, a butoxide, a phenoxide, amethylphenoxide, or a dimethylphenoxide; alternatively, methoxide,ethoxide, a propoxide, or a butoxide; alternatively, a phenoxide, amethylphenoxide, or a dimethylphenoxide. Generally, each P-diketonate ofthe transition metal compound chain transfer agent having the formulaMX⁴ _(p) independently can be acetylacetonate (i.e.,2,4-pentanedionate), hexafluoroacetylacetonate (i.e.,1,1,1,5,5,5-hexatluoro-2,4-pentanedionate), or benzoylacetonate;alternatively, acetylacetonate; alternatively,hexafluoroacetylacetonate; or alternatively, benzoylacetonate. In somenon-limiting aspects, transition metal compound chain transfer agent (orthe transition metal compound chain transfer agent having the formulaMX⁴ _(p)) can comprise, consist essentially of, or can be iron(II)chloride, iron(III) chloride, iron(II) acetate, iron(III) acetate, aniron(II) octanoate, an iron(III) octanoate, iron(II) acetylacetonate,iron(III) acetylacetonate, cobalt(II) chloride, cobalt(III) chloride,cobalt(II) acetate, cobalt(III) acetate, an cobalt(II) octanoate, acobalt(III) octanoate, cobalt(II) acetylacetonate, cobalt(III)acetylacetonate, nickel(II) chloride, nickel(II) acetate, a nickel(II)octanoate, or nickel(II) acetylacetonate; alternatively, iron(II)acetate, iron(III) acetate, an iron(II) octanoate, an iron(III)octanoate, iron(II) acetylacetonate, iron(III) acetylacetonate,cobalt(II) acetate, cobalt(III) acetate, a cobalt(II) octanoate, acobalt(III) octanoate, cobalt(II) acetylacetonate, cobalt(III)acetylacetonate, nickel(II) acetate, a nickel(II) octanoate, ornickel(II) acetylacetonate; alternatively, an iron(II) octanoate, aniron(III) octanoate, iron(II) acetylacetonate; iron(III)acetylacetonate, a cobalt(II) octanoate, a cobalt(III) octanoate,cobalt(II) acetylacetonate, cobalt(III) acetylacetonate, a nickel(II)octanoate, or nickel (II) acetylacetonate; alternatively, an iron(III)octanoate, iron(III) acetylacetonate, a cobalt(III) octanoate,cobalt(III) acetylacetonate, a nickel(II) octanoate, or nickel(II)acetylacetonate.

When hydrogen is utilized, the reaction zone can have any hydrogen toethylene ratio which can provide any desired effect described herein. Inan aspect, a minimum hydrogen to ethylene ratio can be (0.05 ghydrogen)/(kg ethylene), (0.1 g hydrogen)/(kg ethylene), (0.25 ghydrogen)/(kg ethylene), (0.4 g hydrogen)/(kg ethylene), or (0.5 ghydrogen)/(kg ethylene); additionally or alternatively, a maximumhydrogen to ethylene ratio can be (5 g hydrogen)/(kg ethylene), (3 ghydrogen)/(kg ethylene), (2.5 g hydrogen)/(kg ethylene), (2 ghydrogen)/(kg ethylene), or (1.5 g hydrogen)/(kg ethylene). Generally,the reaction zone can have hydrogen to ethylene ratio that can rangefrom any minimum hydrogen to ethylene ratio described herein to anymaximum hydrogen to ethylene ratio described herein. Accordingly,suitable reaction zone hydrogen to ethylene ratios can be in a rangefrom (0.05 g hydrogen)/(kg ethylene) to (5 g hydrogen)/(kg ethylene),from (0.25 g hydrogen)/(kg ethylene) to (5 g hydrogen)/(kg ethylene),from (0.25 g hydrogen)/(kg ethylene) to (4 g hydrogen)/(kg ethylene),from (0.4 g hydrogen)/(kg ethylene) to (3 g hydrogen)/(kg ethylene),from (0.4 g hydrogen)/(kg ethylene) to (2.5 g hydrogen)/(kg ethylene),from (0.4 g hydrogen)/(kg ethylene) to (2 g hydrogen)/(kg ethylene), orfrom (0.5 g hydrogen)/(kg ethylene) to (2 g hydrogen)/(kg ethylene).Other appropriate reaction zone hydrogen to ethylene ratio ranges arereadily apparent from this disclosure.

The organic reaction medium which can be utilized in the processesdescribed herein can be a hydrocarbon, a halogenated hydrocarbon, or acombination thereof, for example. Hydrocarbons and halogenatedhydrocarbons which can be used as the organic reaction medium caninclude aliphatic hydrocarbons, aromatic hydrocarbons, petroleumdistillates, halogenated aliphatic hydrocarbons, halogenated aromatichydrocarbons, or any combination thereof. Aliphatic hydrocarbons whichcan be useful as the organic reaction medium include C₃ to C₂₀ aliphatichydrocarbons, or C₄ to C₁₅ aliphatic hydrocarbons, or C₅ to C₁₀aliphatic hydrocarbons. The aliphatic hydrocarbons which can be used asthe organic reaction medium can be cyclic or acyclic and/or can belinear or branched, unless otherwise specified. Non-limiting examples ofsuitable acyclic aliphatic hydrocarbon organic reaction mediums that canbe utilized singly or in any combination include propane, iso-butane,n-butane, butane (n-butane or a mixture of linear and branched C₄acyclic aliphatic hydrocarbons), pentane (n-pentane or a mixture oflinear and branched C₅ acyclic aliphatic hydrocarbons), hexane (n-hexaneor mixture of linear and branched C₆ acyclic aliphatic hydrocarbons),heptane (n-heptane or mixture of linear and branched C₇ acyclicaliphatic hydrocarbons), and octane (n-octane or a mixture of linear andbranched C₈ acyclic aliphatic hydrocarbons). Aromatic hydrocarbons whichcan be useful as the organic reaction medium include aromatichydrocarbons, or C₆ to C₁₀ aromatic hydrocarbons. Non-limiting examplesof suitable aromatic hydrocarbons that can be utilized singly or in anycombination as the organic reaction medium include benzene, toluene,xylene (including ortho-xylene, meta-xylene, para-xylene, or mixturesthereof), and ethylbenzene. Halogenated aliphatic hydrocarbons which canbe useful as the organic reaction medium include C₁ to C₁₅ halogenatedaliphatic hydrocarbons, or C₁ to C₁₀ halogenated aliphatic hydrocarbons,or C₁ to C₅ halogenated aliphatic hydrocarbons. The halogenatedaliphatic hydrocarbons which can be used as the organic reaction mediumcan be cyclic or acyclic and/or can be linear or branched, unlessotherwise specified. Non-limiting examples of suitable halogenatedaliphatic hydrocarbons which can be utilized as the organic reactionmedium include methylene chloride, chloroform, carbon tetrachloride,dichloroethane, trichloroethane, or any combination thereof Halogenatedaromatic hydrocarbons which can be useful as the organic reaction mediuminclude C₆ to C₂₀ halogenated aromatic hydrocarbons, or C₆ to C₁₀halogenated aromatic hydrocarbons. Non-limiting examples of suitablehalogenated aromatic hydrocarbons which can be used as the organicreaction medium include chlorobenzene, dichlorobenzene, or anycombination thereof

Generally, the oligomer product can be formed using any conditionscapable of forming an oligomer product. Conditions which can be utilizedto form the oligomer product can include, singly or in any combination,reaction zone pressure, reaction zone ethylene partial pressure,reaction zone temperature, reaction zone zirconium of the zirconiumcompound to ethylene molar ratio, reaction zone ethylene to organicreaction medium mass ratio, reaction zone residence time (or averageresidence time), ethylene conversion (or single pass ethyleneconversions, oligomer product Schultz-Flory K value, and oligomerproduct selectivity to normal alpha olefins. Reaction zone pressure,reaction zone ethylene partial pressure, reaction zone temperature,reaction zone zirconium of the zirconium compound to ethylene molarratio, reaction zone ethylene to organic reaction medium mass ratio,reaction zone residence time (or average residence time), ethyleneconversion (or single pass ethylene conversions, oligomer productSchultz-Flory K value, oligomer product selectivity to normal alphaolefins are independently described herein and these independentdescriptions of reaction zone pressure, reaction zone ethylene partialpressure, reaction zone temperature, reaction zone zirconium of thezirconium compound to ethylene molar ratio, reaction zone ethylene toorganic reaction medium mass ratio, reaction zone residence time (oraverage residence time), ethylene conversion (or single pass ethyleneconversions, oligomer product Schultz-Flory K value, and oligomerproduct selectivity to normal alpha olefins can be utilized withoutlimitation and in any combination to further describe the processesdisclosed herein.

The oligomer product can be formed at a reaction zone (or the reactionzone can have a) minimum pressure of 100 psi (689 kPa), 250 psi (1.72MPa), 500 psi (3.45 MPa), 750 psi (5.17 MPa), 900 psi (6.21 MPa), or1000 psi (6.89 MPa); alternatively or additionally, at a maximumpressure of 5000 psi (34.5 MPa), 4500 psi (31 MPa), 4,000 psi (27.6MPa), 3500 psi (24.1 MPa), 3000 psi (20.7 MPa), 2,500 psi (17.2 MPa),2,000 psi (13.8 MPa), 1,500 psi (10.3 MPa), 1250 psi (8.62 MPa), or 1000psi (6.89 MPa). Generally, the oligomer product can be formed at areaction zone (or the reaction zone can have a) a pressure ranging fromany minimum pressure disclosed herein to any maximum pressure disclosedherein. In some non-limiting aspects, the oligomer product can be formedat a reaction zone (or the reaction zone can have a) pressure from 100psi (689 kPa) to 5000 psi (34.5 MPa), 100 psi (689 kPa) to 2,500 psi(17.2 MPa), 100 psi (689 kPa) to 1000 psi (6.89 MPa), 500 psi (3.45 MPa)to 4500 psi (31 MPa), 500 psi (3.45 MPa) to 2,500 psi (17.2 MPa), 500psi (3.45 MPa) to 1000 psi (6.89 MPa), 750 psi (5.17 MPa) to 4500 psi(31 MPa), 900 psi (6.21 MPa) to 4,000 psi (27.6 MPa), or 1000 psi (6.89MPa) to 3500 psi (24.1 MPa). Other pressure ranges that can be utilizedare readily apparent to those skilled in the art with the aid of thisdisclosure.

The oligomer product can be formed at a reaction zone (or the reactionzone can have a) minimum ethylene partial pressure of 100 psi (689 kPa),250 psi (1.72 MPa), 500 psi (345 MPa), 750 psi (5.17 MPa), 900 psi (6.21MPa), or 1000 psi (6.89 MPa); alternatively or additionally, at amaximum pressure of 5000 psi (34.5 MPa), 4500 psi (31 MPa), 4,000 psi(27.6 MPa), 3500 psi (24.1 MPa), 3000 psi (20.7 MPa), 2,500 psi (17.2MPa), 2,000 psi (13.8 MPa), 1,500 psi (10.3 MPa), 1250 psi (8.62 MPa),or 1000 psi (6.89 MPa). Generally, the oligomer product can he formed ata reaction zone (or the reaction zone can have an) ethylene partialpressure ranging from any minimum ethylene partial pressure disclosedherein to any maximum ethylene partial pressure disclosed herein. Insome non-limiting aspects, the oligomer product can be formed at areaction zone (or the reaction zone can have an) ethylene partialpressure from 100 psi (689 kPa) to 5000 psi (34.5 MPa), 100 psi (689kPa) to 2,500 psi (17.2 MPa), 100 psi (689 kPa) to 1000 psi (6.89 MPa),500 psi (3.45 MPa) to 4500 psi (31 MPa), 500 psi (3.45 MPa) to 2,500 psi(17.2 MPa), 500 psi (3.45 MPa) to 1000 psi (6.89 MPa), 750 psi (5.17MPa) to 4500 psi (31 MPa), 900 psi (6.21 MPa) to 4,000 psi (27.6 MPa),or 1000 psi (6.89 MPa) to 3500 psi (24.1 MPa). Other ethylene partialpressure ranges are readily apparent to those skilled in the art withthe aid of this disclosure.

The oligomer product can be formed at a reaction zone (or the reactionzone can have a) minimum temperature of 0° C., 25° C., 40° C., 50° C.,75° C., 100° C. or 125° C.; alternatively or additionally, at a maximumtemperature of 250° C., 200° C., 150° C., 125° C., 100° C., or 90° C.Generally, the oligomer product can be formed at a reaction zone (or thereaction zone can have a) temperature ranging from any minimumtemperature disclosed herein to any maximum temperature disclosedherein. In some non-limiting aspects, the oligomer product can be formedat a reaction zone (or the reaction zone can have a) temperature from 0°C. to 250° C., from 25° C. to 200° C., from 40° C. to 150° C., from 40°C. to 100° C., from 50° C. to 100° C., from 50° C. to 150° C., from 75°C. to 125° C., from 75° C. to 250° C., from 100° C. to 200° C., or from100° C. to 200° C. Other temperature ranges that can be utilized arereadily apparent to those skilled in the art with the aid of thisdisclosure.

The oligomer product can be formed at a reaction zone (or the reactionzone can have) a minimum reaction zone zirconium of the zirconiumcompound to ethylene molar ratio of 5×10⁻⁷:1, 1×10⁻⁶: 1, 5×10⁻⁵: 1, or2.5×10⁻⁵:1; additionally of alternatively, a maximum reaction zonezirconium of the zirconium compound to ethylene molar ratio of7.5×10⁻⁴:1, 5×10⁻⁴:1, 2.5×10⁻⁴:1, or 1×10⁻⁴:1. Generally, reaction zonezirconium of the zirconium compound to ethylene molar ratio can rangefrom any minimum reaction zone zirconium of the zirconium compound toethylene molar ratio disclosed herein to any maximum reaction zonezirconium of the zirconium compound to ethylene molar ratio disclosedherein. In a non-limiting aspect, the reaction zone zirconium of thezirconium compound to ethylene molar ratio can range from 5×10⁻⁷:1 to1×10⁻⁴:1, 1×10⁻⁶:1 to 2.5×10⁻⁴:1, 5×10⁻⁵:1 to 5×10⁻⁴:1, or 2.5×10⁻⁵:1 to7.5×10⁻⁴:1. Other reaction zone zirconium of the zirconium compound toethylene molar ratio ranges that can be utilized are readily apparent tothose skilled in the art with the aid of this disclosure.

The oligomer product can be formed at a reaction zone (or the reactionzone can have a) minimum ethylene:organic reaction medium mass ratio of0.5:1, 0.75:1, 1:1, 1.25:1, or 1.5:1; additionally or alternatively, amaximum ethylene:organic reaction medium mass ratio of 4.5:1, 4:1,3.5:1, 3:1, 2.5:1, or 2:1. Generally, the oligomer product can be formedat a reaction (or the reaction zone can have an) ethylene:organicreaction medium mass ratio in the range from any minimumethylene:organic reaction medium mass ratio disclosed herein to anymaximum ethylene:organic reaction medium mass ratio disclosed herein. Insome non-limiting aspects, the oligomer product can be formed at areaction (or the reaction zone can have an) ethylene:organic reactionmedium mass ratio in the range from 0.5:1 to 4.5:1, from 0.75:1 to 4:1,from 0.75:1 to 2:1, from 1:1 to 3:1, or from 1.5:1 to 2.5:1. Otherethylene:organic reaction medium mass ratio ranges that can be utilizedare readily apparent to those skilled in the art with the aid of thisdisclosure.

The oligomer product can be formed at (or the reaction zone can have)any desired reaction zone residence time (or average reaction zoneresidence time). In an aspect, the oligomer product can be formed at areaction zone residence time (or average reaction zone residence time)to produce a desired quantity of oligomer product, a desired catalystsystem productivity, provide a desired ethylene conversion, or anycombination thereof; alternatively, to produce a desired quantity ofoligomer product; alternatively, a desired catalyst system productivity;or alternatively, provide a desired ethylene conversion. The oligomerproduct can be formed at (or the reaction zone can have) a minimumreaction zone residence time (or average reaction zone residence time)of 10 minutes, 20 minutes, or 30 minutes; additionally or alternatively,a maximum reaction zone residence time (or average reaction zoneresidence time) of 3 hours, 2.5 hours, 2 hours, or 1.5 hours. Generally,the reaction zone residence time (or average reaction zone residencetime) can range from any minimum reaction zone residence time (oraverage reaction zone residence time) disclosed herein to any maximumreaction zone residence time (or average reaction zone residence time)disclosed herein. In some non-limiting aspects, the oligomer product canbe formed at a reaction zone residence time (or average reaction zoneresidence time) ranging from 10 minutes to 2.5 hours. from 20 minutes to2 hours. from 30 minutes to 2 hours, or from 30 minutes to 1.5 hours.Other reaction zone residence time (or average reaction zone residencetime) ranges that can be utilized are readily apparent to those skilledin the art with the aid of this disclosure.

The oligomer product can have (or can be form having) a minimumSchultz-Flory K value of 0.4, 0.45, 0.5; or, 0.55; alternatively oradditionally, a maximum Schultz-Flory K value of 0.9, 0.85, 0.8, 0.75,0.7, or 0.65. The oligomer product can have (or can be form having) aSchultz-Flory K ranging from any minimum Schultz-Flory K value disclosedherein to any maximum Schultz-Flory K value disclosed herein. In anon-limiting aspect, the oligomer product can have (or can be formhaving) a Schultz-Flory K value in the range from 0.4 to 0.9, from 0.4to 0.8, from 0.5 to 0.8, from 0.5 to 0.7, or from 0.55 to 0.7. Otheroligomer product Schultz-Flory K value ranges are readily apparent fromthe present disclosure. In any aspect, the Schultz-Flory K value can bedetermined using adjacent pairs of oligomer product where both of theadjacent oligomer product are selected from C₈, C₁₀, C₁₂, C₁₄, or C₁₆oligomer products. In an embodiment, the Schultz-Flory K value can be anaverage of any two or more Schultz-Flory K values using differentadjacent pairs of produced oligomers described herein. In some aspects,the Schultz-Flory K value can be determined using the C₈ and C₁₀oligomer products, the C₁₀ and C₁₂ oligomer products, the C₁₂ and C₁₄oligomer products, the C₁₄ and C₁₆ oligomer product, the C₈, C₁₀, andC₁₂ oligomer product, or an average of any two more of adjacent pairs ofoligomer products.

The oligomer product can be formed at any desired ethylene conversion(or single pass ethylene conversion). The oligomer product can be formedat a minimum ethylene conversion (or single pass ethylene conversion) of30%, 35%, 40%, 45%, 50% or 55%; additionally or alternatively, a maximumethylene conversion (or single pass ethylene conversion) of 95%, 90%,87.5% 85%, or 80%. Generally, the oligomer product can be formed at anethylene conversion (or single pass ethylene conversion) can range fromany minimum ethylene conversion (or single pass ethylene conversion)disclosed herein to any maximum ethylene conversion (or single passethylene conversion) disclosed herein. In some non-limiting aspects, theoligomer product can be formed at an ethylene conversion (or single passethylene conversion) ranging from 30% to 90%, from 35% to 90%, from 40%to 87.5%, from 45% to 87.5%, from 50% to 85%, or from 55% to 85%. Otherethylene conversion (or single pass ethylene conversion) ranges that canbe utilized are readily apparent to those skilled in the art with theaid of this disclosure. In some aspects, the oligomer product can beformed at an ethylene conversion to provide an oligomer product having adesired selectivity to normal alpha olefins (e.g., % of normal alphaolefin in a designated oligomer product carbon number).

The processes described herein can produce an oligomer product with highselectivity to normal alpha olefins. In an aspect, the C₆ olefinoligomer product produced by the process described herein can have a1-hexene content of at least 98.5 wt. %, 98.75 wt. %, 99.0 wt. %, 99.25wt. %. In an aspect, the C₈ olefin oligomer product produced by theprocess described herein can have a 1-octene content of at least a1-octene content of at least 98 wt. %, 98.25 wt. %, 98.5 wt. %, 98.75wt. %, or 99.0 wt. %. In an aspect, the C₁₀ olefin oligomer productproduced by the process described herein can have a 1-decene content ofat least 97.5 wt. %, 97.75 wt. %, 98 wt. %, 98.25 wt. %, or 98.5 wt. %.In an aspect, the C₁₇ olefin oligomer product produced by the processdescribed herein can have a 1-dodecene content of at least 96.5 wt. %,97 wt. %, 97.5 wt. %, 97.75 wt. %, or 98.0 wt. %. In an aspect, theprocesses described herein can produce an oligomer product that can haveany combination of any C₆ olefin oligomer product 1-hexene contentdescribed herein, any C₈ olefin oligomer product 1-octene contentdescribed herein, any C₁₂ olefin oligomer product 1-decene contentdescribed herein, and/or any C₈ olefin oligomer product 1-octene contentdescribed herein. In some non-limiting aspect, the oligomer product canhave a C₆ olefin oligomer product 1-hexene content of at least 99 wt. %and a C₁₂ olefin oligomer product 1-dodecene content of at least 97.5wt. %; alternatively, a C₈ olefin oligomer product 1-octene content ofat least 98.5 wt. % and a C₁₂ olefin oligomer product 1-dodecene octenecontent of at least 97.5 wt. %; or alternatively, a C₆ olefin oligomerproduct 1-hexene content of at least 99 wt. %, a C₈ olefin oligomerproduct 1-octene content of at least 98.5 wt. %, a C₁₀ olefin oligomerproduct 1-decene content of at least 98 wt. %, and a C₁₂ olefin oligomerproduct 1-dodecene content of at least 97.5 wt. %. Other combinationsoligomer product normal alpha olefin contents are readily apparent fromthe present disclosure.

In an aspect, the processes described herein can produce an oligomerproduct having (a) less than 2.5 wt. %, 1 wt. %, 0.75 wt. %, 0.5 wt. %,0.25 wt. % of polymer, (b) less than 2.5 wt. %, 1 wt. %, 0.75 wt. %, 0.5wt. %, or 0.25 wt. %, compounds having a weight average molecular weightof greater than 1000 g/mol, or (c) any combination thereof relative tothe same process not using a 1) a chain transfer agent comprising acompound having a hydrogen silicon bond, a compound having a hydrogensulfur bond, a compound having a hydrogen phosphorus bond, or anycombination thereof, 2) hydrogen, and/or 3) a transition metal compoundchain transfer agent. The wt. % polymer and the weight average molecularweight of the oligomer product is based on the total weight of theoligomer product. In another separate or combinable aspect, theprocesses described herein can produce an oligomer product having anoligomer product (a) comprising a polymer having a lower Mw, (b) anoligomer product where the polymer has a lower Mw maximum peak, (c) anoligomer product having a reduced quantity of polymer, (d) an oligomerproduct having a reduced % of polymer having a molecular weight greaterthan 100,000 molecular weight, or (e) any combination thereof relativeto the same process not using a 1) a chain transfer agent comprising acompound having a hydrogen silicon bond, a compound having a hydrogensulfur bond, a compound having a hydrogen phosphorus bond, or anycombination thereof, 2) hydrogen, and/or 3) a transition metal compoundchain transfer agent. In an aspect, the amount of polymer present in theoligomer product per gram of oligomer product produced can be decreasedby at least 10%, 25%, 40%, 50%, 60%, 70%, or 80% as compared to polymerproduced relative to the same process not using a 1) a chain transferagent comprising a compound having a hydrogen silicon bond, a compoundhaving a hydrogen sulfur bond, a compound having a hydrogen phosphorusbond, or any combination thereof, 2) hydrogen, and/or 3) a transitionmetal compound chain transfer agent. In an aspect, the amount of polymerhaving a molecular weight greater than 100,000 molecular weight can bedecreased by at least 10%, 25%, 40%, 50%, 60%, 70%, or 80% as comparedto polymer produced relative to the same process not using a 1) a chaintransfer agent comprising a compound having a hydrogen silicon bond, acompound having a hydrogen sulfur bond, a compound having a hydrogenphosphorus bond, or any combination thereof, 2) hydrogen, and/or 3) atransition metal compound chain transfer agent.

The reaction zone in which the oligomer product is formed can compriseany suitable reactor. Non-limiting examples of reactor types can includea stirred tank reactor, a plug flow reactor, or any combination thereof;alternatively, a stirred tank reactor; alternatively, a plug flowreactor; alternatively, a fixed bed reactor, a continuous stirred tankreactor, a loop slurry reactor, a solution reactor, a tubular reactor, arecycle reactor, or any combination thereof; alternatively, a continuousstirred tank reactor; alternatively, a loop slurry reactor;alternatively, a solution reactor; alternatively, a tubular reactor; oralternatively, a recycle reactor. In an aspect, the reaction zone canhave more than one reactor in series and/or in parallel and includingany combination of reactor types and arrangements. Moreover, theoligomerization process used to form the oligomer product can be acontinuous process, a semi-continuous process, or a batch process, orany reactor or vessel within the oligomerization reaction system can beoperated continuously, semi-continuously, or batchwise.

Additional information regarding zirconium based catalyst systems foroligomerizing ethylene (including specific examples) and the processutilizing zirconium based catalyst system for producing an oligomerproduct can be found in, but not necessarily limited to, U.S. Pat. Nos.4,361,714, 4,377,720, 4,396,788, 4,409,414, 4,410,750, 4,434,312,4,434,313, 4,442,309, 4,486,615, 4,783,573, 4,855,525, 4,886,933,4,966,874, 5,260,500, 6,576,721, 7,897,826, US 2003/0153798, U.S. Pat.Nos. 7,169,961, 7,291,685, 7,566,679, 8,269,055, US 2009/0216057, US2009/0306312, US 2010/0191029, US 2010/0292423, US 2011/0046429, US2011/0054130, US 2011/0054233, US 2012/0184692, US 2020/0055799, US2020/0062672, US 2020/0055800, US 2020/0062673, EP 320,571 A2, EP444,505 A2, EP 1,749,807 A1, EP 1,752,434 A1, EP 1,780,189, EP 2,258,674A1, WO 91/02707, Sekiyu Gakkaishi, Vol. 37, No. 4, 1994, pp. 337-346,Sekiyu Gakkaishi, Vol. 42, No. 4, 1999, pp. 235-245, Sekiyu Gakkaishi,Vol. 43, No. 5, 200o, pp. 328-338, Sekiyu Gakkaishi, Vol. 44, No. 1,2001, pp. 25-35, and Sekiyu Gakkaishi, Vol. 44, No. 2, 2001, pp.109-119.

EXAMPLES

The disclosure is further illustrated by the following examples, whichare not to be construed in any way as imposing limitations to the scopeof this disclosure. Various other aspects, modifications, andequivalents thereof which, after reading the description herein, maysuggest themselves to one of ordinary skill in the art without departingfrom the spirit of the present disclosure or the scope of the appendedclaims.

Ethylene Oligomerization Apparatus

FIG. 1 provides a diagram of the continuous ethylene oligomerizationapparatus. The continuous ethylene oligomerization apparatus includes a0.5 liter autoclave (functions as the reactor), a 5 gallon high pressureproduct tank, a primary catalyst system pump, a secondary catalystsystem pump, an organic reaction medium pump, a hydrogen feedline, anchain transfer agent feedline, and associated equipment (e.g., valvesand piping among other associated equipment). An autoclave effluentsample port is located on an autoclave effluent line running between theautoclave and the high pressure product tank. The reactor effluent lineconnecting the reactor and high pressure product tank is heat traced andthe skin temperature is maintained at the reaction temperature. The 0.5liter autoclave includes an overhead magnetic mechanical stirrer toprovide mixing of the reaction mixture, and internal cooling coils (toflow a heat exchange fluid) and external heating jacket which areutilized as necessary to maintain the desired temperature. Thecontinuous ethylene oligomerization apparatus also includeshigh-pressure nitrogen feed lines to the 0.5 liter autoclave reactor andproduct tank to provide an inert atmosphere to both vessels. Thehydrogen feedline is connected to the ethylene feedline and metered toprovide a desired hydrogen:ethylene ratio (when utilized), while thechain transfer agent feedline is connected to the organic reactionmedium feedline on the suction side of the diluent pump and metered toprovide a desired amount of chain transfer agent to the reactor.Catalyst system is fed to the reactor via one or two ISCO syringe pumps(catalyst system feed pumps) while organic reaction medium is feed froman organic reaction feed tank via an organic reaction medium pump. Thecontinuous ethylene oligomerization apparatus utilizes the primarycatalyst system solution feed pump when a prepared catalyst system isfed to the reactor, The continuous ethylene oligomerization apparatusutilizes the primary and secondary catalyst system feed pumps when twosolutions containing the one or more components of the catalyst systemare separately fed into a feed line to the reactor.

During the continuous ethylene oligomerization, a catalyst systempump(s) (ISCO syringe pumps) continuously fed(s) the catalyst systemsolution(s) to the reactor at the desired rate(s), an organic reactionmedium pump continuously feds the organic reaction medium to theautoclave at the desired rate, and ethylene is continuously fed to thereactor though a mass flow meter connected at the desired rate. catalystsystem and ethylene are introduced into the autoclave via a dip tubesuch that the catalyst system solution and ethylene enter the liquidcontents of the autoclave at approximately the midpoint of the verticalheight of the autoclave.

Example 1

In an argon atmosphere dry box, a 500 mL flask equipped with a stirreris charged with 20 mmol of zirconium tetrachloride anhydride (ZrCl4) and250 mL of dry cyclohexane. The mixture is then stirred for 10 minutes atroom temperature. To the stirred mixture is added triethylaluminum (TEA)and then ethylaluminum sesquichioride (EASC) to provide a mixture thathas a EASC:TEA molar ratio of 3.5:1 and an aluminum to zirconium molarratio of 7:1. The resultant mixture is then heated at 70° C. for 2hours. The mixture is then cooled to room temperature. A 50 mL portionof the cooled mixture and is transferred to a one liter volumetric flaskalong with an amount of thiophene to thiophene:zirconium molar ratio of3:1. The one liter volumetric is then charged with enough drycyclohexane to provide one liter of catalyst system mixture. Thezirconium concentration of the thus prepared catalyst systemmixture/liter of cyclohexane and has an aluminum to zirconium molarratio of 7:1, a EASC:TEA molar ratio of 3.5:1, and a thiophene:zirconiummolar ratio of 3:1. The catalyst system mixture volumetric flask is thencapped and removed from the argon atmosphere dry box.

Run 1-1 (Comparative)

The oligomerization apparatus as previously described is utilized usingonly the primary catalyst system solution pump. The oligomerizationreactor is prepared for ethylene oligomerization by charging the highpressure product tank to the desired pressure using the high pressure N₂fill line. The reactor is also cycled through three high pressure N₂fill (to 800 psig—5.5 MPa) and vent cycles while isolated from theprimary catalyst system solution pump. Each nitrogen purge is performedby closing the valve leading to the product tank, charging nitrogen tothe autoclave through the spare entry port to a pressure of 800 psig(5.5 MPa), holding the nitrogen pressure on the autoclave for 5 minutesand then releasing the nitrogen pressure on the autoclave by opening thevalve leading to the product tank. After the nitrogen of the finalnitrogen purge is released, the autoclave is maintained with a slightresidual nitrogen pressure. Catalyst system mixture, 200 mL, is thentransferred to the catalyst system ISCO syringe pump of the preparedethylene oligomerization apparatus. The reactor is then quickly filledorganic reaction medium (cyclohexane). The diluent pump is then turnedon at rate of 335 mL per hour to bring the reactor up to a reactionpressure of 925 psi (6.37 MPa). When the reactor achieves the reactionpressure, the overhead magnetic stirrer is started and set for ˜1200 rpmand the heating jacket turned on and set for 120° C. When the reactorachieves a stable temperature of 120° C., the catalyst system ISCO pumpis turned on and set to feed the catalyst system mixture to the reactorat a rate of 15 mL/hr. After 30 minutes, ethylene is then introducedinto the reactor at an initial rate of at 50 grams/hour and graduallyincreased, over a 30 minute period, to a final rate of 175 grams/hour.The oligomerization temperature is maintained by using the internalcooling coils and external heating jacket as needed. After 6 hours, theoligomerization is terminated by decreasing the catalyst system flowrateto zero, decreasing the ethylene flow rate to zero, and turning off theheating jacket. When the reactor attains room temperature, the organicreaction medium flow rate is decreased to zero, and the liquid contentsof the reactor pressured into the high pressure product tank using highpressure N₂.

The reactor is then opened and the solids inside the reactor andcovering the internal reactor surfaces collected and added to thereactor effluent collected in the high pressure product tank. A liquidsample, 250 grams, of the product tank is collected and a known amountof internal standard (e.g. nonane) is added to the sample. The sample isthen treated with 5 wt. % sodium hydroxide solution to deactivate thecatalyst system. The organic layer of the sodium hydroxide treatedsample is then analyzed using gas chromatographic analysis to determineoligomer product distribution, Schulz-Flory K value, carbon numberpurities, and catalyst system productivities. The remaining contents ofthe product tank are then homogenized and a second sample, 250 grams, ofthe product tank is taken. The second sample is then subjected to rotaryevaporation for 1 h at 100° C. at −30 in Hg to effectively remove allthe liquid. The mass of the remaining wax and polymer is determined. Aportion of the wax is then analyzed by thermogravimetric analysis (TGA)to calculate the fraction of the solid sample that is polymer using thecutoffs of A) liquid (≤175° C.), B) waxes (175° C. to 420° C., and C)polymer ≥420° C. A second portion of the wax and polymer is analyzed byHPLC to determine the molecular weight distribution of the polymerproduced in the oligomerization including Mw, Mn, and Mp. The liquid andpolymer analysis results are used to determine the oligomer productdistribution, Schulz-Flory K value, carbon number purities, catalystsystem productivities, polymer Mw, polymer Mw maximum peak, percentageof polymer in the oligomer product, percentage of polymer having an Mwgreater than 100,000, and percentage of oligomer product having a Mwgreater than 1,000 g/mol.

Run 1-2.

In an argon atmosphere dry box, a 250 mL volumetric flask is chargedwith 0.1 mole of triethylsilane (a chain transfer agent) and thencharged with enough dry cyclohexane to provide 250 mL of chain transferagent mixture. The chain transfer agent mixture volumetric flask is thencapped and removed from the argon atmosphere dry box.

A chain transfer agent feed line is connected to organic reaction mediumfeedline on the suction side of the organic reaction medium pump. Theprocedure of Run 1-1 is repeated but with the addition of thetriethylsilane solution to the suction side of the diluent pump meteredto provide a triethylsilane to ethylene mole ratio of 1×10⁻³:1 (˜15mL/hour when ethylene flowrate is 175 grams/hour) throughout theethylene oligomerization.

Run 1-3

In an argon atmosphere dry box, a 250 mL volumetric flask is chargedwith 0.1 mmole of iron(III) octanoate (a transition metal compound chaintransfer agent) and then charged with enough dry cyclohexane to provide250 mL of transition metal compound chain transfer agent mixture. Thechain transfer agent mixture volumetric flask is then capped and removedfrom the argon atmosphere dry box.

A transition metal compound chain transfer agent feed line is connectedto organic reaction medium feedline on the suction side of the organicreaction medium pump. The procedure of Run 1-1 is repeated but with theaddition of the iron(III) octanoate solution to the suction side of thediluent pump metered to provide an iron(III) octanoate to ethylene moleratio of 1×10⁻⁶:1 (˜15 mL/hour when ethylene flowrate is 175 grams/hour)throughout the ethylene oligomerization.

Run 1-4

A hydrogen feed line is connected to the ethylene feedline of theethylene oligomerization apparatus. The procedure of Run 1-1 is repeatedbut with hydrogen being metered into the ethylene at a rate to provide ahydrogen to ethylene mass ratio of (1 g hydrogen)/(kg ethylene)throughout the ethylene oligomerization.

The gas chromatographic analyses and HPLC analyses of ethyleneoligomerization Runs, 1-2, 1-3, and 1-4 using a chain transfer agentwere reviewed and compared to the gas chromatographic analyses and HPLCanalyses of ethylene oligomerization Run 1-1. The analyses show that theoligomer product that is produced in ethylene oligomerization Runs 1-2,1-3, and 1-4 using a chain transfer agent has less than 1 wt. % ofpolymer and/or less than 1 wt.% compounds having a weight averagemolecular weight of greater than 1000 g/mol, when compared to ethyleneoligomerization Run 1-1 which did not utilize a chain transfer agent.The analyses also show that the oligomer product that is produced inethylene oligomerization Runs 1-2, 1-3, and 1-4 using a chain transferagent produces an oligomer product comprising a polymer having a lowerMw, a polymer having a lower Mw maximum peak, a reduced percentage ofpolymer, and/or a polymer having a reduced percentage of polymer havinga Mw greater than 100,000 when compared to ethylene oligomerization Run1-1 which did not utilize a chain transfer agent. The gaschromatographic analyses of the oligomer product of Runs, 1-1, 1-2, 1-3,and 1-4 indicate that there is no significant discernable impact on theSchulz-Flory K value, carbon number purities, and catalyst systemproductivities when a chain transfer agent is utilized in the ethyleneoligomerization.

Example 2

In an argon atmosphere dry box, a first 500 mL flask equipped with astirrer is charged with zirconium(IV) isopropylcarboxylate (60 mmol),anisole (45 mmol), and dry toluene (200 mL). This first mixture is thenstirred for 10 minutes at room temperature. in the argon dry box, asecond 500 mL flask equipped with a stirrer is charged with2-pyrrolidone (43 mmol) and dry toluene (200 mL). To this second mixtureis added neat diethylaluminum chloride (1.2 mol) over a period of 30minutes. This second mixture is then stirred for an additional 10minutes. The first mixture is then transferred to a one liter volumetricflask. The second mixture is then added to the first mixture in thevolumetric flask and then the volumetric flask is charged with enoughdry toluene to provide a one liter solution of the first catalyst systemmixture. After through mixing, a 200 mL portion of the first catalystsystem mixture is transferred to a second one liter volumetric flaskalong with enough dry toluene to provide one liter of a second catalystsystem mixture. The zirconium concentration of the thus prepared secondcatalyst system mixture is 12 mmol/liter and has an anisole to zirconiummolar ratio of 0.75:1, an aluminwn:zirconium molar ratio of 20:1, and2-pyrrolidone:Al ratio of 0.15:1. The second catalyst system mixturevolumetric flask is then capped and removed from the argon atmospheredry box.

Run 2-1 (Comparative)

The oligomerization apparatus as previously described is utilized usingonly the primary catalyst system solution pump. The oligomerizationreactor is prepared for ethylene oligomerization by charging the highpressure product tank to the desired pressure using the high pressure N₂fill line. The reactor is also cycled through three high pressure N₂fill (to 800 psig—5.5 MPa) and vent cycles while isolated from theprimary catalyst system solution pump. Each nitrogen purge is performedby closing the valve leading to the product tank, charging nitrogen tothe autoclave through the spare entry port to a pressure of 800 psig(5.5 MPa), holding the nitrogen pressure on the autoclave for 5 minutesand then releasing the nitrogen pressure on the autoclave by opening thevalve leading to the product tank. After the nitrogen of the finalnitrogen purge is released, the autoclave is maintained with a slightresidual nitrogen pressure. Second catalyst system mixture, 200 mL, isthen transferred to the catalyst system ISCO syringe pump of theprepared ethylene oligomerization apparatus. The reactor is then quicklyfilled organic reaction medium (cyclohexane). The diluent pump is thenturned on at rate of 485 mL per hour to bring the reactor up to areaction pressure of 450 psi (3.1 MPa). When the reactor achieves thereaction pressure, the overhead magnetic stirrer is started and set for˜1200 rpm and the heating jacket turned on and set for 70° C. When thereactor achieves a stable temperature of 70° C., the catalyst systemISCO pump is turned on and set to feed the catalyst system mixture tothe reactor at a rate of 15 mL/hr. After 30 minutes, ethylene is thenintroduced into the reactor at an initial rate of at 50 grams/hour andgradually increased, over a 30 minute period, to a final rate of 175grams/hour. The oligomerization temperature is maintained by using theinternal cooling coils and external heating jacket as needed. After 6hours, the oligomerization is terminated by decreasing the catalystsystem flowrate to zero, decreasing the ethylene flow rate to zero, andturning off the heating jacket. When the reactor attains roomtemperature, the organic reaction medium flow rate is decreased to zero,and the liquid contents of the reactor pressured into the high pressureproduct tank using high pressure N₂.

The reactor is then opened and the solids inside the reactor andcovering the internal reactor surfaces collected and added to thereactor effluent collected in the high pressure product tank. A liquid.sample, 250 grams, of the product tank is collected and a known amountof internal standard (e.g nonane) is added to the sample. The sample isthen treated with 5 wt. % sodium hydroxide solution to deactivate thecatalyst system. The organic layer of the sodium hydroxide treatedsample is then analyzed using gas chromatographic analysis to determineoligomer product distribution, Schulz-Flory K value, carbon numberpurities, and catalyst system productivities. The remaining contents ofthe product tank are then homogenized and a second sample, 250 grams, ofthe product tank is taken. The second sample is then subjected torotary- evaporation for 1 h at 100° C. at −30 in Hg to effectivelyremove all the liquid. The mass of the remaining wax and polymer isdetermined. A portion of the wax is then analyzed by thermogravimetricanalysis (TGA) to calculate the fraction of the solid sample that ispolymer using the cutoffs of A) liquid (≤175° C.), B) waxes (175° C. to420° C., and C) polymer ≥420° C. A second portion of the wax and polymeris analyzed by HPLC to determine the molecular weight distribution ofthe polymer produced in the oligomerization including Mw, Mn, and Mp.The liquid and polymer analysis results are used to determine theoligomer product distribution, Schulz-Flory K value, carbon numberpurities, catalyst system productivities, polymer Mw, polymer Mw maximumpeak, percentage of polymer in the oligomer product, percentage ofpolymer having

Run 2-2.

In an argon atmosphere dry box, a 250 mL volumetric flask is chargedwith 0.1 mole of triethylsilane (a chain transfer agent) and thencharged with enough dry cyclohexane to provide 250 mL of chain transferagent mixture. The chain transfer agent mixture volumetric flask is thencapped and removed from the argon atmosphere dry box.

A chain transfer agent feed line is connected to organic reaction mediumfeedline on the suction side of the organic reaction medium pump. Theprocedure of Run 2-1 is repeated but with the addition of thetriethylsilane solution to the suction side of the diluent pump meteredto provide a triethylsilane to ethylene mole ratio of 1×10⁻³:1 (˜15mL/hour when ethylene flowrate is 175 grams/hour) throughout theethylene oligomerization.

Run 2-3

In an argon atmosphere dry box, a 250 mL volumetric flask is chargedwith 0.1 mmole of iron(III) octanoate (a transition metal compound chaintransfer agent) and then charged with enough dry cyclohexane to provide250 mL of transition metal compound chain transfer agent mixture. Thechain transfer agent mixture volumetric flask is then capped and removedfrom the argon atmosphere dry box.

A transition metal compound chain transfer agent feed line is connectedto organic reaction medium feedline on the suction side of the organicreaction medium pump. The procedure of Run 2-1 is repeated but with theaddition of the iron(III) octanoate solution to the suction side of thediluent pump metered to provide an iron(III) octanoate to ethylene moleratio of 1×10⁻⁶:1 (˜15 mL/hour when ethylene flowrate is 175 grams/hour)throughout the ethylene oligomerization.

Run 2-4

A hydrogen feed line is connected to the ethylene feedline of theethylene oligomerization apparatus. The procedure of Run 2-1 is repeatedbut with hydrogen being metered into the ethylene at a rate to provide ahydrogen to ethylene mass ratio of (1 g hydrogen)/(kg ethylene)throughout the ethylene oligomerization.

The gas chromatographic analyses and HPLC analyses of ethyleneoligomerization Runs, 2-2, 2-3, and 2-4 using a chain transfer agentwere reviewed and compared to the gas chromatographic analyses and HPLCanalyses of ethylene oligomerization Run 2-1. The analyses show that theoligomer product that is produced in ethylene oligomerization Runs 2-2,2-3, and 2-4 using a chain transfer agent has less than 1 wt. % ofpolymer and/or less than 1 wt.% compounds having a weight averagemolecular weight of greater than 1000 g/mol, when compared to ethyleneoligomerization Run 2-1 which did not utilize a chain transfer agent.The analyses also show that the oligomer product that is produced inethylene oligomerization Runs 2-2, 2-3, and 2-4 using a chain transferagent produces an oligomer product comprising a polymer having a lowerMw, a polymer having a lower Mw maximum peak, a reduced percentage ofpolymer, and/or a polymer having a reduced percentage of polymer havinga Mw greater than 100,000 when compared to ethylene oligomerization Run1-1 which did not utilize a chain transfer agent. The gaschromatographic analyses of the oligomer product of Runs, 2-1, 2-2, 2-3,and 2-4 indicate that there is no significant discernable impact on theSchulz-Flory K value, carbon number purities, and catalyst systemproductivities when a chain transfer agent is utilized in the ethyleneoligomerization

Example 3

In an argon atmosphere dry box, a first 500 mL flask equipped with astirrer is charged with zirconium tetrachloride (100 mmol),isodecylacetates (105 mmol), and dry ortho-xylene (200 mL). Thiszirconium mixture is then stirred for 10 minutes at room temperature.The first zirconium mixture then transferred to a one liter volumetricflask and the one liter volumetric flask is then charged with enoughortho-xylene to provide a one liter solution of first zirconiumsolution. After through mixing, a 200 mL portion of the first zirconiumsolution is transferred to a second one liter volumetric flask alongwith enough dry ortho-xylene to provide one liter of a second zirconiumsolution. The second zirconium solution has an isodecylacetates:Zr molarratio of 1.05:1. The second zirconium solution volumetric flask is thencapped and removed from the argon atmosphere dry box.

In the argon dry box, a second 500 mL flask equipped with a stirrer ischarged with dry ortho-xylene (500 mL). To the ortho-xylene added, withstirring, neat diethylaluminum chloride (1.2 mol) over a period of 30minutes. This mixture is then stirred for an additional 10 minutes. Thisdiethylaluminum chloride solution is then transferred to a one litervolumetric flask and the one liter volumetric flask is then charged withenough ortho-xylene to provide a one liter solution of first zirconiumsolution. After through mixing, a 200 mL portion of the firstdiethylaluminum chloride solution is transferred to a second one litervolumetric flask along with enough dry ortho-xylene to provide one literof a second diethylaluminum chloride solution. The seconddiethylaluminum chloride solution volumetric flask is then capped andremoved from the argon atmosphere dry box.

Run 3-1 (Comparative)

The oligomerization apparatus as previously described is utilized withthe following modification: the 500 mL autoclave is replaced by a 200 mLautoclave (also equipped with an overhead magnetic mechanical stirrer toprovide mixing of the reaction mixture, and internal cooling coils andexternal heating jacket) and both the primary and secondary catalystsystem pumps are utilized. The oligomerization reactor is prepared forethylene oligomerization by charging the high pressure product tank tothe desired pressure using the high pressure N₂ fill line. The reactoris also cycled through three high pressure N₂ fill (to 800 psig—5.5 MPa)and vent cycles while isolated from the primary and secondary catalystsystem solution pump. Each nitrogen purge is performed by closing thevalve leading to the product tank, charging nitrogen to the autoclavethrough the spare entry port to a pressure of 800 psig (5.5 MPa),holding the nitrogen pressure on the autoclave for 5 minutes and thenreleasing the nitrogen pressure on the autoclave by opening the valveleading to the product tank. After the nitrogen of the final nitrogenpurge is released, the autoclave is maintained with a slight residualnitrogen pressure. Second zirconium mixture, 200 mL, is transferred tothe primary catalyst system ISCO syringe pump of the prepared ethyleneoligomerization apparatus. Second diethylalurninum chloride solution,200 mL, is transferred to the secondary catalyst system ISCO syringepump of the prepared ethylene oligomerization apparatus. The reactor isthen quickly filled dry organic reaction medium (ortho-xylene). Thediluent pump is then turned on at rate of 680 mL per hour to bring thereactor up to a reaction pressure of 3000 psi (20.7 MPa). When thereactor achieves the reaction pressure, the overhead magnetic stirrer isstarted and set for ˜1200 rpm and the heating jacket turned on and setfor 165° C. When the reactor achieves a stable temperature of 70° C.,the primary and secondary catalyst system ISCO pumps are turned on andset to feed the second zirconium solution and the seconddiethylalurninum chloride solutions at a rate of 11 mL/hr. The feed rateof the zirconium solution and the diethylaluminum chloride solutionprovide an Al:Zr ratio of 12:1. After 30 minutes, ethylene is thenintroduced into the reactor at an initial rate of at 50 grams/hour andgradually increased, over a 30 minute period, to a final rate of 600grams/hour. The oligomerization temperature is maintained by using theinternal cooling coils and external heating jacket as needed. After 4hours, the oligomerization is terminated by decreasing the flow/rate ofthe zirconium solution and the diethylaluminum chloride solution feedrates to zero, decreasing the ethylene flow rate to zero, and turningoff the heating jacket. When the reactor attains room temperature, theorganic reaction medium flow rate is decreased to zero, and the liquidcontents of the reactor pressured into the high pressure product tankusing high pressure N₂.

The reactor is then opened and the solids inside the reactor andcovering the internal reactor surfaces collected and added to thereactor effluent collected in the high pressure product tank. A liquidsample, 250 grams, of the product tank is collected and a known amountof internal standard (e.g. nonane) is added to the sample. The sample isthen treated with 5 wt. % sodium hydroxide solution to deactivate thecatalyst system. The organic layer of the sodium hydroxide treatedsample is then analyzed using gas chromatographic analysis to determineoligomer product distribution, Schulz-Flory K value, carbon numberpurities, and catalyst system productivities. The remaining contents ofthe product tank are then homogenized and a second sample, 250 grams, ofthe product tank is taken. The second sample is then subjected to rotaryevaporation for 1 h at 100° C. at −30 in Hg to effectively remove allthe liquid. The mass of the remaining wax and polymer is determined. Aportion of the wax is then analyzed by thermogravimetric analysis (TGA)to calculate the fraction of the solid sample that is polymer using thecutoffs of A) liquid (≤175° C.), B) waxes (175° C. to 420° C., and C)polymer ≥420° C. A second portion of the wax and polymer is analyzed byHPLC to determine the molecular weight distribution of the polymerproduced in the oligomerization including Mw, Mn, and Mp. The liquid andpolymer analysis results are used to determine the oligomer productdistribution, Schulz-Flory K value, carbon number purities, catalystsystem productivities, polymer Mw, polymer Mw maximum peak, percentageof polymer in the oligomer product, percentage of polymer having

Run 3-2.

In an argon atmosphere dry box, a 250 mL volumetric flask is chargedwith 360 mmol of triethylsilane (a chain transfer agent) and thencharged with enough dry ortho-xylene to provide 250 mL of chain transferagent mixture. The chain transfer agent mixture volumetric flask is thencapped and removed from the argon atmosphere dry box.

A chain transfer agent feed line is connected to organic reaction mediumfeedline on the suction side of the organic reaction medium pump. Theprocedure of Run 3-1 is repeated but with the addition of thetriethylsilane solution to the suction side of the diluent pump meteredto provide a triethylsilane to ethylene mole ratio of 1×10⁻³:1 (˜15mL/hour when ethylene flowrate is 600 grams/hour) throughout theethylene oligomerization.

Run 3-3

In an argon atmosphere dry box, a 250 mL volumetric flask is chargedwith 0.36 mmole of iron(III) octanoate (a transition metal compoundchain transfer agent) and then charged with enough dry cyclohexane toprovide 250 mL of transition metal compound chain transfer agentmixture. The chain transfer agent mixture volumetric flask is thencapped and removed from the argon atmosphere dry box.

A transition metal compound chain transfer agent feed line is connectedto organic reaction medium feedline on the suction side of the organicreaction medium pump. The procedure of Run 3-1 is repeated but with theaddition of the iron(III) octanoate solution to the suction side of thediluent pump metered to provide an iron(III) octanoate to ethylene moleratio of 1×10⁻⁶:1 (˜15 mL/hour when ethylene flowrate is 175 grams/hour)throughout the ethylene oligomerization.

Run 3-4

A hydrogen feed line is connected to the ethylene feedline of theethylene oligomerization apparatus. The procedure of Run 3-1 is repeatedbut with hydrogen being metered into the ethylene at a rate to provide ahydrogen to ethylene mass ratio of (1 g hydrogen)/(kg ethylene)throughout the ethylene oligomerization.

The gas chromatographic analyses and HPLC analyses of ethyleneoligomerization Runs, 3-2, 3-3, and 3-4 using a chain transfer agentwere reviewed and compared to the gas chromatographic analyses and HPLCanalyses of ethylene oligomerization Run 3-1. The analyses show that theoligomer product that is produced in ethylene oligomerization Runs 3-2,3-3, and 3-4 using a chain transfer agent has less than 1 wt. % ofpolymer and/or less than 1 wt.% compounds having a weight averagemolecular weight of greater than 1000 g/mol, when compared to ethyleneoligomerization Run 3-1 which did not utilize a chain transfer agent.The analyses also show that the oligomer product that is produced inethylene oligomerization Runs 3-2, 3-3, and 3-4 using a chain transferagent produces an oligomer product comprising a polymer having a lowerMw, a polymer having a lower Mw maximum peak, a reduced percentage ofpolymer, and/or a polymer having a reduced percentage of polymer havinga Mw greater than 100,000 when compared to ethylene oligomerization Run3-1 which did not utilize a chain transfer agent. The gaschromatographic analyses of the oligomer product of Runs, 3-1, 3-2, 3-3,and 3-4 indicate that there is no significant discernable impact on theSchulz-Flory K value, carbon number purities, and catalyst systemproductivities when a chain transfer agent is utilized in the ethyleneoligomerization

Illustrative statements of the subject matter claimed herein below willnow be provided. In the interest of clarity, not all features of anactual implementation are described in this specification. It can beappreciated that in the development of any such actual embodiment,numerous implementation-specific decisions must be made to achieve thedevelopers' specific goals, such as compliance with system-related andbusiness-related constraints, which can vary from one implementation toanother. Moreover, it can be appreciated that such a development effort,even if complex and time-consuming, would be a routine undertaking forthose of ordinary skill in the art having the benefit of thisdisclosure. Furthermore, various modifications can be made within thescope of the invention as herein intended, and embodiments of theinvention can include combinations of features other than thoseexpressly claimed. In particular, flow arrangements other than thoseexpressly described herein are within the scope of the invention.

Statement 1. A process comprising: a) contacting i) ethylene, ii) acatalyst system (or catalyst system components) comprising 1) azirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is a halide, each Y¹ independently is a hydrocarboxide, adihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate,or a β-diketonate, m is a range from 0 to 4, q is in a range from 0 to4. and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetalcompound, iii) a chain transfer agent comprising a compound having ahydrogen silicon bond, a compound having a hydrogen sulfur bond, acompound having a hydrogen phosphorus bond, or any combination thereof,and iv) optionally, an organic reaction medium; and b) forming anoligomer product in the reaction zone.

Statement 2. A process comprising: a) introducing i) ethylene, ii) acatalyst system (or catalyst system components) comprising 1) azirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is a halide, each Y¹ independently is a hydrocarboxide, adihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate,or a β-diketonate, m is a range from 0 to 4, q is in a range from 0 to4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetalcompound, iii) a chain transfer agent comprising a compound having ahydrogen silicon bond, a compound having a hydrogen sulfur bond, acompound having a hydrogen phosphorus bond, or any combination thereof,and iv) optionally, an organic reaction medium into a reaction zone; andb) forming an oligomer product in a reaction zone.

Statement 3. The process of statement 1 or 2, wherein the chain transferagent comprises a compound having the formula R³¹SiH₃, (R³¹)₂SiH₂,(R³¹)₃SiH, R³¹OSiH3, (R³¹O)₂SiH₂, (R³¹O)₃SiH, R³²SH, R³²CO₂CH₂SH,R³²CO₂CH₂CH₂SH, R³³PH₂, (R³³)₂PH, R³³OPH₂, (R³³O)₂PH, or any combinationthereof wherein each R³¹, R³², and R³³ independently are a C₁ toC₁₅hydrocarbyl group.

Statement 4. The process of any one of statements 1-3, wherein thereaction zone has any hydrogen of the chain transfer agent to ethylenemole ratio disclosed herein e.g., (a minimum value of 1×10⁻⁵:1,5×10⁻⁴:1, 1×10⁻⁴:1, or 5×10⁻³:1; a maximum value of 5×10⁻¹:1, 1×10⁻¹:1,5×10⁻²:1, or 1×10⁻²:1; in a range from 1×10⁻⁵:1 to 5×10⁻¹:1, 5×10⁻⁴:1 to1×10⁻¹:1, 1×10⁻⁴:1 to 5×10⁻²:1, or 5×10 ⁻³:1 to 1×10⁻²:1; among othersvalues and ranges).

Statement 5. A process comprising: a) contacting i) ethylene, ii) acatalyst system (or catalyst system components) comprising 1) azirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is a halide, each Y¹ independently is a hydrocarboxide, adihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate,or a β-diketonate, m is a range from 0 to 4, q is in a range from 0 to4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetalcompound, iii) hydrogen, and iv) optionally, an organic reaction medium;and b) forming an oligomer product in a reaction zone.

Statement 6. A process comprising: a) introducing i) ethylene, ii) acatalyst system (or catalyst system components) comprising 1) azirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is a halide, each Y¹ independently is a hydrocarboxide, adihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate,or a β-diketonate, m is a range from 0 to 4, q is in a range from 0 to4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetalcompound, iii) hydrogen, and iv) optionally, an organic reaction mediuminto a reaction zone; and b) forming an oligomer product in the reactionzone.

Statement 7. The process of statement 5 or 6, wherein the reaction zonehas any hydrogen to ethylene mass ratio disclosed herein (e.g., aminimum value of (0.05 g hydrogen)/(kg ethylene), (0.1 g hydrogen)/(kgethylene), (0.25 g hydrogen)/(kg ethylene), (0.4 g hydrogen)/(kgethylene), or (0.5 g hydrogen)/(kg ethylene); a maximum value of (5 ghydrogen)/(kg ethylene), (3 g hydrogen)/(kg ethylene), (2.5 ghydrogen)/(kg ethylene), (2 g hydrogen)/(kg ethylene), or (1.5 ghydrogen)/(kg ethylene); in a range from (0.05 g hydrogen)/(kg ethylene)to (5 g hydrogen)/(kg ethylene), from (0.25 g hydrogen)/(kg ethylene) to(5 g hydrogen)/(kg ethylene), from (0.25 g hydrogen)/(kg ethylene) to (4g hydrogen)/(kg ethylene), from (0.4 g hydrogen)/(kg ethylene) to (3 ghydrogen)/(kg ethylene), from (0.4 g hydrogen)/(kg ethylene) to (2.5 ghydrogen)/(kg ethylene), from (0.4 g hydrogen)/(kg ethylene) to (2 ghydrogen)/(kg ethylene), or from (0.5 g hydrogen)/(kg ethylene) to (2 ghydrogen)/(kg ethylene); among others values and ranges.

Statement 8. A process comprising: a) contacting i) ethylene, ii) acatalyst system (or catalyst system components) comprising 1) azirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is a halide, each Y¹ independently is a hydrocarboxide, adihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate,or a β-diketonate, m is a range from 0 to 4, q is in a range from 0 to4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetalcompound, iii) a transition metal compound chain transfer agent, and iv)optionally, an organic reaction medium; and b) forming an oligomerproduct in a reaction zone.

Statement 9. A process comprising: a) introducing i) ethylene, ii) acatalyst system (or catalyst system components) comprising 1) azirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is a halide, each Y¹ independently is a hydrocarboxide, adihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate,or a β-diketonate, m is a range from 0 to 4, q is in a range from 0 to4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetalcompound, iii) a transition metal compound chain transfer agent, and iv)optionally, an organic reaction medium into a reaction zone; and b)forming an oligomer product in the reaction zone.

Statement 10. The process of statement 8 or 9, wherein the transitionmetal compound chain transfer agent is any transition metal compoundchain transfer agent having the formula MX⁴ _(p) where M is thetransition metal, X⁴ is a mono anion, and p is an integer from 2 to 4.

Statement 11. The process of statement 10, wherein the transition metalcompound chain transfer agent is any described herein having the formulaMX⁴ _(p) where M is iron, cobalt, or nickel.

Statement 12. The process of statement 10 or 11, wherein transitionmetal compound chain transfer agent is any transition metal compoundchain transfer agent having the formula MX⁴ _(p) described herein whereX⁴ is a C₄ to C19 carboxylate.

Statement 13. The process of statement of any one of statements 8 to 12,wherein the reaction zone has any transition metal of the transitionmetal compound chain transfer agent to ethylene mole ratio disclosedherein (a minimum value of 1×10⁻⁹:1, 5×10⁻⁸:1, 1×10⁻⁸:1, 5×10⁻⁷:1, or1×10⁻⁷:1; a maximum value of 5×10 ⁻³:1, 1×10′:1, 5×10⁻⁴:1, 1×10⁻⁴:1, or5×10 ⁻⁵:1; in a range from 1×10⁻⁹:1 to 5×10⁻³:1, 5×10⁻⁸:1 to 1×10⁻³:1,1×10⁻⁸:1 to 5×10⁻⁴:1, 5×10⁻⁷:1 to 1×10⁻⁴:1, or 1×10⁻⁷:1 to 5×10⁻⁵:1;among others values and ranges).

Statement 14. The process of any one of Statements 1-13, wherein thehydrocarbylmetal compound is any hydrocarbylmetal compound disclosedherein (e.g., comprise any metal disclosed herein—a group 1, 2, 11, 12,13, or 14 metal, among other metal groups disclosed herein—and anyhydrocarbyl group disclosed herein—a C₁ to C₂₀, a C₁ to C₁₀, or a C₁ toC₆ hydrocarbyl group and other more specific hydrocarbyl groupsdisclosed herein).

Statement 15. The process of any one of Statements 1-14, wherein themetal of the hydrocarbylmetal compound to zirconium of the zirconiumcompound is any value disclosed herein (e.g., a minimum value of 0.1:1,0.2:1, 0.6:1, 1:1, 2:1 10:1; a the maximum value or 100:1 75:1, 50:125:1, 15:1, or 10:1; or in a range of from 0.1:1 to 100:1, 0.2:1 to75:1, 0.6:1 to 25:1, 1:1 to 50:1, 2:1 to 25:1, 1:1 to 15:1, 2:1 to 10:1,10:1 to 50:1, or 10:1 to 25:1; among others values and ranges).

Statement 16. The process of any one of statement 1-15, wherein thecatalyst system (or catalyst system components) further comprises aneutral non-ionic organic modifier.

Statement 17. The process of statement 16, wherein the neutral non-ionicorganic modifier comprises any an ether, an ester, a ketone, analdehyde, an alcohol, an anhydride, an acid chloride, a nitrile, asulfide, a disulfide, a phosphine, an amine, or an amide describedherein.

Statement 18. The process of statement 16 or 17, wherein the neutralnon-ionic organic modifier to zirconium of the zirconium compound molarratio can have any values described herein (e.g., a minimum value of0.1:1, 0.5:1, 0.75:1 0.8:1, 0.9:1, or 1:1; a maximum value of 20:1,15:1, 10:1 7.5:1, or 5:1; or in a range from 0.5:1 20:1, 0.5:1 to 15:1,0.75: 10:1, 1:1 to 15:1, 1:1 to 10:1, 1:1 to 5:1, 0.5:1 to 5:1, 0.75:1to 3:1, 0.8:1 to 2:1, 0.9:1 or 1.25; among other values and ranges.

Statement 19. The process of any one of statements 16-18, whereinneutral non-ionic organic modifier to hydrocarbylmetal (orhydrocarbylaluminum) compound molar ratio can have any value describedherein (e.g., an minimum value of be 0.05:1, 0.1:1, 0.5:1, 0.75:1 0.8:1,0.9:1, or 1:1; a maximum value of 5:1, 3:1, 2:1, 1.5:1, 1:1, 0.75:1, or0.5:1; or in a range from 0.05:1 to 5:1, 0.1 to 1:1 0.1 to 0.5:1, 0.5: 1to 5:1, 0.5:1 to 3:1, 0.75:1 to 2:1, or 0.75:1 to 1.5:1; among othervalues and ranges.

Statement 20. The process of any one of statements 1-19, wherein thezirconium compound has the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is chloride or bromide, each Y¹ independently is a C₁ toC₁₀ hydrocarboxide (e.g., any described herein), a C₁ toC₁₅hydrocarbylcarboxylate (e.g., any described herein), or a C₁ to C₁₅hydrocarbylsulfonate (e.g., any described herein), m is a range from 0to 4, q is in a range from 0 to 4, and m+q is 4.

Statement 21. The process of any one of statements 1-20, wherein thehydrocarbylmetal compound comprises an alkylaluminum compound having theformula AlX² _(3−n)R¹ _(n), Al₂X² _(6−q−)R¹ _(q), R¹ ₂Zn, or anycombination thereof, where each R¹ independently is a C₁ to C₁₀ alkylgroup, each X² independently is chloride, bromide, or iodide, n is aninteger from 0 to 3, and q is an integer for 0 to 6.

Statement 22. The process of any one of statements 20-22, wherein theneutral non-ionic organic modifier comprises any C₂ to C₂₀ ether, C₃ toC₂₀ ester, C₃ to C₂₀ ketone, C₂ to C₂₀ nitrile, C₂ to C₂₀ sulfide, C₂ toC₂₀ disulfide, C₃ to C₂₀ phosphine, C₁ to C₂₀ amine, or C₂ to C₂₀ amidedescribed herein.

Statement 23. The process of any one of statements 1-19, wherein thezirconium compound has the formula ZrX¹ _(m) where each X¹ independentlyis a chloride or bromide and m is 4, the hydrocarbylmetal compound hasthe formula AlX² _(n)R¹ _(3−n), Al₂X² ₃R¹ ₃, R¹ ₂Zn, or any combinationthereof where each X² independently is a halide and each R¹independently is C₂ to C₄ alkyl group, and the metal of thehydrocarbylmetal (or aluminum of the hydrocarbylaluminum) compound tozirconium of the zirconium compound molar ratio is in any rangedisclosed herein (e.g., in a range of from 1:1 to 50:1).

Statement 24. The process of statement 23, wherein the catalyst system(or catalyst system components) further comprise a neutral non-ionicorganic modifier comprising C₂ to C₂₀ ester, and wherein the neutralnon-ionic organic modifier to zirconium of the zirconium compound molarratio is in is in any range disclosed herein (e.g., in a range of from0.5:1 to 5:1), and the metal of the hydrocarbylmetal (or aluminum of thehydrocarbylaluminum) compound to zirconium of the zirconium compoundmolar ratio is in any range disclosed herein (e.g., in a range of from10:1 to 25:1).

Statement 25. The process of statement 24, wherein the neutral non-ionicorganic modifier is contacted with the zirconium compound prior to thezirconium compound contacting ethylene and/or the hydrocarbylmetalcompound (and/or being introduced into the reaction zone).

Statement 26. The process of statement 23 or 24, wherein the catalystsystem (or catalyst system components) further comprise a neutralnon-ionic organic modifier comprising a C₂ to C₂₀ ether, a C₂ to C₂₀sulfide, a C₁ to C₂₀ amine, a C₃ to C₂₀ phosphine, or any combinationthereof, and wherein the neutral non-ionic organic modifier to zirconiumof the zirconium compound molar ratio is in any range disclosed herein(e.g., in a range of from 0.5:1 to 20:1), and the metal of thehydrocarbylmetal (or aluminum of the hydrocarbylaluminum) compound tozirconium of the zirconium compound molar ratio is in any rangedisclosed herein (e.g., in a range of from 1:1 to 15:1).

Statement 27. The process of any one of statements 1-19, where thezirconium compound has the formula ZrX¹ _(m)Y¹ _(q), where each X¹independently is chloride or bromide, each Y¹ independently is a C₁ toC₁₀ hydrocarboxide (e.g., any described herein), a C₁ to C₁₀hydrocarbylcarboxylate (e.g., any described herein), or a C₁ to C₁₅hydrocarbylsulfonate (e.g., any described herein), m is a range from 0to 4, q is in a range from 0 to 4, and m+q is 4, the hydrocarbylmetalcompound comprises a hydrocarbylmetal compound having the formula AlX²_(n)R¹ _(3−n), Al₂X² ₃R¹ ₃, or any combination thereof where each X²independently is a halide and each R¹ independently is C₂ to C₄ alkylgroup, and the metal of the hydrocarbylmetal (or aluminum of thehydrocarbylaluminum) compound to zirconium of the zirconium compoundmolar ratio is in a range of from 1:1 to 50:1.

Statement 28. The process of statement 27, wherein the zirconiumcompound is at least partially hydrolyzed by contacting the zirconiumcompound with water using any water to zirconium molar ratio disclosedherein (e.g., 0.01:1 to 3:1, 0.1: to 2:1, 0.25:1 to 1.75:1).

Statement 29. The process of statement 27 or 28, wherein the catalystsystem (or catalyst system components) further comprise a neutralnon-ionic organic modifier comprising a C₂ to C₁₅ amide, and wherein theneutral non-ionic organic modifier to metal of the hydrocarbylmetal (oraluminum of the hydrocarbylaluminum) compound molar ratio is in a rangeof 0.1:1 to 1:1.

Statement 30. The process of statement 29, wherein the neutral non-ionicorganic modifier is contacted with the hydrocarbylmetal (orhydrocarbylaluminum) compound prior to the hydrocarbylmetal (orhydrocarbylaluminum) compound contacting ethylene (and/or beingintroduced into the reaction zone).

Statement 31. The process of any one of statements 27-30, wherein thecatalyst system (or catalyst system components) further comprise aneutral non-ionic organic modifier comprising a C₂ to C20 ether, a C₂ toC₂₀ sulfide, a C₁ to C₂₀ amine, or any combination thereof, and whereinthe neutral non-ionic organic modifier to zirconium of the zirconiumcompound is in any range disclosed herein (e.g., in a range of from0.1:1 to 10:1).

Statement 32. The process of statement 31, wherein the neutral non-ionicorganic modifier is contacted with the zirconium compound prior to thezirconium compound contacting ethylene and/or the hydrocarbylmetalcompound (and/or being introduced into the reaction zone).

The process of any one of statements 1-32, wherein the oligomer productis formed at (or the reaction zone has) any reaction zone zirconium ofthe zirconium compound to ethylene molar ratio described herein (e.g., aminimum reaction zone zirconium of the zirconium compound to ethylenemolar ratio of 5×10⁻⁷:1, 1×10⁻⁶:1, 5×10⁻⁵:1, or 2.5×10⁻⁵:1; a maximumreaction zone zirconium of the zirconium compound to ethylene molarratio of 7.5×10⁻⁴:1, 5×10⁻⁴:1, 2.5×10⁻⁴:1, or 1×10⁻⁴:1; a reaction zonezirconium of the zirconium compound to ethylene molar ratio ranging from5×10⁻⁷:1 to 1×10⁻⁴:1, 1×10⁻⁶:1 to 2.5×10⁻⁴:1, 5×10⁻⁵:1 to 5×10⁻⁴:1, or2.5×10 ⁻⁵:1 to 7.5×10⁻⁴:1; among other reaction zone zirconium of thezirconium compound to ethylene molar ratios and ranges).

Statement 34. The process of any one of statements 1-33, wherein theoligomer product is formed at (or the reaction zone has) any pressuredescribed herein (e.g., a minimum pressure of 100 psi (689 kPa), 250 psi(1.72 MPa), 500 psi (3.45 MPa), 750 psi (5.17 MPa), 900 psi (6.21 MPa),or 1000 psi (6.89 MPa); a maximum pressure of 5000 psi (34.5 MPa), 4500psi (31 MPa), 4,000 psi (27.6 MPa), 3500 psi (24.1 MPa), 3000 psi (20.7MPa), 2,500 psi (17.2 MPa), 2,000 psi (13.8 MPa), 1,500 psi (10.3 MPa),1250 psi (8.62 MPa), or 1000 psi (6.89 MPa); or a pressure in the rangeof from 100 psi (689 kPa) to 5000 psi (34.5 MPa), 100 psi (689 kPa) to2,500 psi (17.2 MPa), 100 psi (689 kPa) to 1000 psi (6.89 MPa), 500 psi(3.45 MPa) to 4500 psi (31 MPa), 500 psi (3.45 MPa) to 2,500 psi (17.2MPa), 500 psi (3.45 MPa) to 1000 psi (6.89 MPa), 750 psi (5.17 MPa) to4500 psi (31 MPa), 900 psi (6.21 MPa) to 4,000 psi (27.6 MPa), or 1000psi (6.89 MPa) to 3500 psi (24.1 MPa); among other pressures andpressure ranges).

Statement 35. The process of any one of statements 1-34, wherein theoligomer product is formed at (or the reaction zone has) any ethylenepartial pressure described herein (e.g., a minimum ethylene partialpressure of 100 psi (689 kPa), 250 psi (1.72 MPa), 500 psi (3.45 MPa),750 psi (5.17 MPa), 900 psi (6.21 MPa), or 1000 psi (6.89 MPa); amaximum ethylene partial pressure of 5000 psi (34.5 MPa), 4500 psi (31MPa), 4,000 psi (27.6 MPa), 3500 psi (24.1 MPa), 3000 psi (20.7 MPa),2,500 psi (17.2 MPa), 2,000 psi (13.8 MPa), 1,500 psi (10.3 MPa), 1250psi (8.62 MPa), or 1000 psi (6.89 MPa); or an ethylene partial pressurein the range of from 100 psi (689 kPa) to 5000 psi (34.5 MPa), 100 psi(689 kPa) to 2,500 psi (17.2 MPa), 100 psi (689 kPa) to 1000 psi (6.89MPa), 500 psi (3.45 MPa) to 4500 psi (31 MPa), 500 psi (3.45 MPa) to2,500 psi (17.2 MPa), 500 psi (3.45 MPa) to 1000 psi (6.89 MPa), 750 psi(5.17 MPa) to 4500 psi (31 MPa), 900 psi (6.21 MPa) to 4,000 psi (27.6MPa), or 1000 psi (6.89 MPa) to 3500 psi (24.1 MPa); among otherethylene partial pressures and pressure ranges).

Statement 36. The process of any one of statements 1-35, wherein theoligomer product is formed at (or the reaction zone has) any temperaturedescribed herein (e.g., a minimum temperature of 0° C., 25° C., 40° C.,50° C., 75° C., 100° C. or 125° C.; a maximum temperature of 250° C.,200° C., 150° C., 125° C., 100° C., or 90° C.; a temperature in rangingfrom 0° C. to 250° C., from 25° C. to 200° C., from 40° C. to 150° C.,from 40° C. to 100° C., from 50° C. to 100° C., from 50° C. to 150° C.,from 75° C. to 125° C., from 75° C. to 250° C., from 100° C. to 200° C.,or from 100° C. to 200° C.; among other temperature values and ranges).

Statement 37. The process of any one of statements 1-36, wherein theoligomer product is formed at (or the reaction zone has) anyethylene:organic reaction medium mass ratio described herein (e.g., aminimum ethylene:organic reaction medium mass ratio of 0.5:1, 0.75:1,1:1, 1.25:1, or 1.5:1; a maximum ethylene:organic reaction medium massratio of 4.5:1, 4:1, 3.5:1, 3:1, 2.5:1, or 2:1; an ethylene:organicreaction medium mass ratio ranging from 0.5:1 to 4.5:1, from 0.75:1 to4:1, from 0.75:1 to 2:1, from 1:1 to 3:1, or from 1.5:1 to 2.5:1; amongother ethylene:organic reaction medium mass ratio values and ranges).

Statement 38. The process of any one of statements 1-37, wherein theoligomer product is formed at (or the reaction zone has) any reactionzone residence time (or average reaction zone residence time) describedherein (e.g., a minimum reaction zone residence time (or averagereaction zone residence time) of 10 minutes, 20 minutes, or 30 minutes;a maximum reaction zone residence time (or average reaction zoneresidence time) of 3 hours, 2.5 hours, 2 hours, or 1.5 hours; a reactionzone residence time (or average reaction zone residence time) rangingfrom 10 minutes to 2.5 hours, from 20 minutes to 2 hours, from 30minutes to 2 hours, or from 30 minutes to 1.5 hours; among otherreaction zone residence time (or average reaction zone residence time)values and ranges.

Statement 39. The process of any one of statements 1-38, wherein theoligomer product can be formed at any ethylene conversion (or singlepass ethylene conversion) described herein (e.g., a minimum ethyleneconversion (or single pass ethylene conversion) of 30%, 35%, 40%, 45%,50% or 55%; additionally or alternatively, a maximum ethylene conversion(or single pass ethylene conversion) of 95%, 90%, 87.5% 85%, or 80%; anethylene conversion (or single pass ethylene conversion) ranging from30% to 90%, from 35% to 90%, from 40% to 87.5%, from 45% to 87.5%, from50% to 85%, or from 55% to 85%; among other ethylene conversion (orsingle pass ethylene conversion) values and ranges.

Statement 40. The process of any one of statements 1-39, wherein theoligomer product can have any Schulz-Flory K value disclosed herein(e.g., a minimum Schulz-Flory K value of 0.4, 0.45, 0.5, or 0.55; amaximum Schulz-Flory K value of 0.9, 0.85, 0.8, 0.75, 0.7, or 0.65; aSchulz-Flory K ranging from 0.4 to 0.9, from 0.4 to 0.8, from 0.5 to0.8, from 0.5 to 0.7, or from 0.55 to 0.7; among other Schulz- Flory Kvalues and ranges.

Statement 41. The process of any one of statements 1-40, wherein theprocess produces an oligomer product comprising (a) polymer having alower Mw, (b) a polymer having a lower Mw maximum peak, (c) a reducedpercentage of polymer, (d) a polymer having a reduced percentage ofpolymer having a Mw greater than 100,000, or (e) any combination thereofrelative to the same process not using a) the chain transfer agentcomprising a compound having a hydrogen silicon bond, a compound havinga hydrogen sulfur bond, a compound having a hydrogen phosphorus bond, orany combination thereof in any one of statements 1-4, 2) hydrogen in anyone statements 5-7, and/or 3) the transition metal compound chaintransfer agent in any one of statements 8-13.

Statement 42. The process of any one of statements 1-41, wherein theoligomer product comprises (a) less than 1 wt. % of polymer, (b) lessthan 1 wt.% compounds having a weight average molecular weight ofgreater than 1000 g/mol, or (c) any combination thereof wherein the wt.% is based on the total weight of the oligomer product.

All publications and patents mentioned herein are incorporated herein byreference. The publications and patents mentioned herein can be utilizedfor the purpose of describing and disclosing, for example, theconstructs and methodologies that are described in the publications,which might be used in connection with the presently describedinvention. The publications discussed throughout the text are providedsolely for their disclosure prior to the filing date of the presentapplication. Nothing herein is to be construed as an admission that theinventors are not entitled to antedate such disclosure by virtue ofprior invention.

We claim:
 1. A process comprising: a) contacting i) ethylene, ii) a catalyst system comprising
 1. a zirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹ independently is a halide, each Y¹ independently is a hydrocarboxide, a dihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate, or a β-diketonate, m is in a range from 0 to 4, q is in a range from 0 to 4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetal compound, iii) a chain transfer agent comprising a hydrogen silicon bond, a compound having a hydrogen sulfur bond, a compound having a hydrogen phosphorus bond, or any combination thereof, and iv) optionally, an organic reaction medium; and b) forming an oligomer product in a reaction zone; and wherein the oligomer product has a Schulz-Flory K value from 0.4 to 0.8.
 2. The process of claim 1, wherein the chain transfer agent comprises a compound having the formula R³¹SiH₃, (R³¹)₂SiH₂, (R³¹)₃SiH, R³¹OSiH3, (R³¹O)₂SiH₂, (R³¹O)₃SiH, R³²SH, R³²CO₂CH₂SH, R³²CO₂CH₂CH₂SH, R³³PH₂, (R³³)₂PH, R³³OPH₂, (R³³O)₂PH, or any combination thereof, wherein each R³¹, R³², and R³³ independently is a C₁ to C₁₅ hydrocarbyl group.
 3. The process of claim 1, wherein the reaction zone has a chain transfer agent to ethylene mole ratio in a range from 1×10⁻⁵:1 to 5×10⁻¹:1.
 4. The process of claim 1, wherein the oligomer product comprises (a) less than 1 wt. % of polymer, (b) less than 1 wt. % compounds having a weight average molecular weight of greater than 1000 g/mol, or (c) any combination thereof, wherein the wt. % is based on the total weight of the oligomer product.
 5. The process of claim 1, wherein the process produces an oligomer product comprising (a) polymer having a lower Mw, (b) a polymer having a lower Mw maximum peak, (c) a reduced percentage of polymer, (d) a polymer having a reduced percentage of polymer having a Mw greater than 100,000 g/mol, or (e) any combination thereof, relative to the same process not using the chain transfer agent comprising a compound having a hydrogen silicon bond, a compound having a hydrogen sulfur bond, a compound having a hydrogen phosphorus bond, or any combination thereof.
 6. The process of claim 1, wherein the hydrocarbylmetal compound has the formula AlX² _(3−n)R¹ _(n), Al₂X² _(6−q−)R¹ _(q), R¹ ₂Zn, or any combination thereof, wherein each R¹ independently is a C₁ to C₁₀ alkyl group, each X² independently is chloride, bromide, or iodide, n is an integer from 0 to 3, and q is an integer for 0 to
 6. 7. The process of claim 1, wherein the catalyst system further comprises a neutral non-ionic organic modifier.
 8. The process of claim 7, wherein the neutral non-ionic organic modifier comprises an ether, an ester, a ketone, an aldehyde, an alcohol, an anhydride, an acid chloride, a nitrile, a sulfide, a disulfide, a phosphine, an amine, or an amide.
 9. The process of claim 1, wherein the zirconium compound has the formula ZrX¹ _(m) where each X¹ independently is chloride or bromide and m is 4, and wherein the hydrocarbylmetal compound has the formula AlX² _(n)R¹ _(3−n), Al₂X² ₃R¹ ₃, R¹ ₂Zn, or any combination thereof, wherein each X² independently is a halide and each R¹ independently is C₂ to C₄ alkyl group.
 10. The process of claim 9, wherein the catalyst system further comprises a C₂ to C₂₀ ester, a C₂ to C₂₀ ether, or a C₂ to C₂₀ sulfide as a neutral non-ionic organic modifier.
 11. The process of claim 1, wherein the zirconium compound has the formula ZrY¹ _(q) where each Y¹ independently is ⁻OR², wherein R² is a C₁ to C₁₀ alkyl group or ⁻OC(═O)R³, wherein R³ is a C₁ to C₁₀ alkyl group and q is an integer from 2 to 4, and wherein the hydrocarbylmetal compound has the formula AlX³ _(n)R¹ _(3−n), Al₂X³ ₃R¹ ₃, or any combination thereof, wherein each X² independently is a halide and each R¹ independently is C₂ to C₄ alkyl group.
 12. A process comprising: a) contacting i) ethylene, ii) a catalyst system comprising
 1. a zirconium compound having the formula ZrX¹ _(m)Y¹ _(q), wherein each X¹ independently is a halide, each Y¹ independently is a hydrocarboxide, a dihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate, or a β-diketonate, m is in a range from 0 to 4, q is in a range from 0 to 4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetal compound, iii) hydrogen, and iv) optionally, an organic reaction medium; and b) forming an oligomer product in a reaction zone; and wherein the oligomer product has a Schulz-Flory K value from 0.4 to 0.8.
 13. The process of claim 12, wherein the reaction zone has a hydrogen to ethylene mass ratio in range from (0.05 g hydrogen)/(kg ethylene) to (5 g hydrogen)/(kg ethylene).
 14. The process of claim 12, wherein the oligomer product comprises (a) less than 1 wt. % of polymer, (b) less than 1 wt. % compounds having a weight average molecular weight of greater than 1000 g/mol, or (c) any combination thereof, wherein the wt. % is based on the total weight of the oligomer product.
 15. The process of claim 12, wherein the process produces an oligomer product comprising (a) polymer having a lower Mw, (b) a polymer having a lower Mw maximum peak, (c) a reduced percentage of polymer, (d) a polymer having a reduced percentage of polymer having a Mw greater than 100,000 g/mol, or (e) any combination thereof, relative to the same process not using hydrogen.
 16. The process of claim 12, wherein the hydrocarbylmetal compound has the formula AlX² _(3−n)R¹ _(n), Al₂X² _(6−q−R) ¹ _(q), R¹ ₂Zn, or any combination thereof, wherein each R¹ independently is a C₁ to C₁₀ alkyl group, each X² independently is chloride, bromide, or iodide, n is an integer from 0 to 3, and q is an integer for 0 to
 6. 17. The process of claim 12, wherein the catalyst system further comprises a neutral non-ionic organic modifier.
 18. The process of claim 17, wherein the neutral non-ionic organic modifier comprises an ether, an ester, a ketone, an aldehyde, an alcohol, an anhydride, an acid chloride, a nitrile, a sulfide, a disulfide, a phosphine, an amine, or an amide.
 19. The process of claim 12, wherein the zirconium compound has the formula ZrX¹ _(m), wherein each X¹ independently is chloride or bromide and in is 4, and wherein the hydrocarbylmetal compound has the formula AlX² _(n)R¹ _(3−n), Al₂X² ₃R¹ ₃, R¹ ₂Zn, or any combination thereof, wherein each X² independently is a halide and each R¹ independently is C₂ to C₄ alkyl group.
 20. The process of claim 19, wherein the catalyst system further comprises a C₂ to C₂₀ ester, a C₂ to C₂₀ ether, or a C₂ to C₂₀ sulfide as a neutral non-ionic organic modifier.
 21. The process of claim 12, wherein the zirconium compound has the formula ZrY¹ _(q) where each Y¹ independently is ⁻OR², wherein R² is a C₁ to C₁₀ alkyl group or ⁻OC(═O)R³, wherein R³ is a C₁ to C₁₀ alkyl group and q is an integer from 2 to 4, and wherein the hydrocarbylmetal compound has the formula AlX³ _(n)R¹ _(3−n), Al₂X³ ₃R¹ ₃, or any combination thereof, wherein each X³ independently is a halide and each R¹ independently is C₂ to C₄ alkyl group.
 22. A process comprising: a) contacting i) ethylene, ii) a catalyst system comprising
 1. a zirconium compound having the formula ZrX¹ _(m)Y¹ _(q), where each X¹ independently is a halide, each Y¹ independently is a hydrocarboxide, a dihydrocarbylazanide, a hydrocarbylcarboxylate, a hydrocarbylsulfonate, or a β-diketonate, m is in a range from 0 to 4, q is in a range from 0 to 4, and m+q is an integer from 2 to 4, and 2) a hydrocarbylmetal compound, iii) a transition metal compound chain transfer agent, and iv) optionally, an organic reaction medium; and b) forming an oligomer product in a reaction zone; and wherein the oligomer product has a Schulz-Flory K value from 0.4 to 0.8.
 23. The process of claim 22, wherein the transition metal compound chain transfer agent is a transition metal compound chain transfer agent having the formula MX⁴ _(p), wherein M is a transition metal, X⁴ is a mono anion, and p is an integer from 2 to
 4. 24. The process of claim 23, wherein M is iron, cobalt, or nickel.
 25. The process of claim 23, wherein X⁴ is a C₄ to C₁₉ carboxylate.
 26. The process of claim 23, wherein the reaction zone has a metal of the chain transfer agent to ethylene mole ratio in a range of from 1×10⁻⁸ to 1×10⁻³.
 27. The process of claim 22, wherein the oligomer product comprises (a) less than 1 wt. % of polymer, (b) less than 1 wt. % compounds having a weight average molecular weight of greater than 1000 g/mol, or (c) any combination thereof, wherein the wt. % is based on the total weight of the oligomer product.
 28. The process of claim 22, wherein the process produces an oligomer product comprising (a) polymer having a lower Mw, (b) a polymer having a lower Mw maximum peak, (c) a reduced percentage of polymer, (d) a polymer having a reduced percentage of polymer having a Mw greater than 100,000 g/mol, or (e) any combination thereof, relative to the same process not using the transition metal compound chain transfer agent.
 29. The process of claim 22, wherein the hydrocarbylmetal compound has the formula AlX² _(3−n)R¹ _(n), Al₂X² _(6−q−)R¹ _(q), R¹ ₂Zn, or any combination thereof, wherein each R¹ independently is a C₁ to C₁₀ alkyl group, each X² independently is chloride, bromide, or iodide, n is an integer from 0 to 3, and q is an integer for 0 to
 6. 30. The process of claim 22, wherein the catalyst system further comprises a neutral non-ionic organic modifier.
 31. The process of claim 30, wherein the neutral non-ionic organic modifier comprises an ether, an ester, a ketone, an aldehyde, an alcohol, an anhydride, an acid chloride, a nitrile, a sulfide, a disulfide, a phosphine, an amine, or an amide.
 32. The process of claim 22, wherein the zirconium compound has the formula ZrX¹ _(m), wherein each X¹ independently is chloride or bromide and m is 4, and wherein the hydrocarbylmetal compound has the formula AlX² _(n)R¹ _(3−n), Al₂X² ₃R¹ ₃, R¹ ₂Zn, or any combination thereof, wherein each X² independently is a halide and each R¹ independently is C₂ to C₄ alkyl group.
 33. The process of claim 32, wherein the catalyst system further comprises a C₂ to C₂₀ ester, a C₂ to C₂₀ ether, or a C₂ to C₂₀ sulfide as a neutral non-ionic organic modifier.
 34. The process of claim 22, wherein the zirconium compound has the formula ZrY¹ _(q), wherein each Y¹ independently is ⁻OR², wherein R² is a C₁ to C₁₀ alkyl group or ⁻OC(═O)R³, wherein R³ is a C₁ to C₁₀alkyl group and q is an integer from 2 to 4, and wherein the hydrocarbylmetal compound has the formula AlX³ _(n)R¹ _(3−n), Al₂X³ ₃R¹ ₃, or any combination thereof, wherein each X² independently is a halide and each R¹ independently is C₂ to C₄ alkyl group. 